Welcome to NASA's science Live.
This is your chance to interact with NASA experts
and have your questions answered in real time.
I'm your host Tahira Allen.
Today, we're diving into the excitement
surrounding the upcoming
total solar eclipse that will cross North America,
passing over Mexico, the United States and Canada.
If you have questions throughout the show, you can send them in
using the hashtag Ask NASA on social media or drop them
directly into the comment box wherever you're watching.
Now, this eclipse isn't just any ordinary celestial event.
It is a rare opportunity for millions
to witness the moon completely block out the sun,
turning day into dusk for those in the path of totality.
And get this,
this will be the last total solar eclipse to cross
the contiguous United States for the next 20 years.
What makes this even more special is that an estimated
31.6 million people live within the path of totality.
And if you're not in the path of totality, no worries.
Everyone in the contiguous United States
will have the chance to see at least a partial solar eclipse.
Now, picture this
a collective pause as people across the U.S. gaze
upward to experience the wonder of the cosmos together.
I can't wait.
And today, I'm joined by Dr.
Gina DiBraccio, a Sun expert who's going to walk us through
how to prepare for the April 8th event.
Gina, welcome. Hi, Tahira, Thanks for having me.
And thank you so much for being here.
Now, can you kick off by telling our viewers
a little bit about your role here at NASA?
Sure.
So I'm the deputy director of the Heliophysics Science
Division at NASA's Goddard Space Flight Center.
That means I'm helping to oversee
an organization of scientists that are studying Heliophysics,
which is the study of the sun and its influence on everything.
So we're looking at the physics of the sun,
but also how it impacts the Earth's magnetic field,
the upper atmosphere, and really just understanding
how the whole system works together.
That is great.
And I'm so happy to be here with you again today. Yes.
Gina and I had a blast hosting last year's
annular solar eclipse, and I think it's safe to say
we are thrilled to be back again for the total solar eclipse.
Now, before we dive into some details,
Gina, can you help clear something up for me?
Sure.
What exactly sets an annular
solar eclipse apart from a total solar eclipse like this year?
Okay,
so when a solar eclipse happens, the moon is going to cross in
between the earth and the sun.
And when that happens, the moon's shadow is cast on the
on the earth.
And we can look up in the sky and see it.
Now, for an annular eclipse,
the moon is going to be just a little bit farther away
so that it doesn't completely block out the sun.
And that's what you can see on the screen here.
You're left with a ring of fire in the sky.
Now, for a total solar eclipse,
the moon is going to be closer to the earth
so that the sun is completely blocked.
And that way we can see the solar corona.
It's that hot upper atmosphere of the sun that we can't see
with our visible eyes on a day to day basis.
So it's really good to know that difference because, you know,
it's my understanding that in total
solar eclipse, the safety tips then are a little bit different
than an annular. Right, Exactly.
And so for our viewers at home, we have a special guest,
someone you might recognize who's here
to let us know how to safely view the April 8th event.
Hey, Eclipse enthusiast Lance Bass here.
And I want to tell you how to protect those eyes and stay safe
during a solar eclipse during these celestial events,
the sun, earth and moon are in sync, creating solar eclipses.
You can look directly at the sun during a total solar eclipse,
but only when it's completely
covered by the moon for a brief period known as totality.
This is a really special moment at all.
Other times you should wear eclipse glasses
so that you don't say bye bye bye to your vision.
Seriously.
And eclipse glasses are not the same as regular sunglasses.
No, they're not safe.
Solar viewers are thousands of times
darker and will have a specific certification
that you should look for right here.
Don't be a space cowboy and try to look directly at the sun.
If you don't have Eclipse glasses,
you can use an indirect viewing method
like a pinhole projector.
You can make one of these with something
as simple as an index card with a hole or a calendar,
or even your hands with a sun at your back.
You can safely project an image of the sun
through the hole onto a nearby surface, like the ground.
It's going to be me
who is wearing my eclipse glasses, and so are you.
Okay.
We are already seeing a lot of questions
pouring in online from our viewers watching.
So let's jump right into this Q&A.
Now, remember, if you're watching live,
you can submit
your own questions for Gina using the hashtag ask
NASA or by posting them in the comments.
Wherever you're watching today.
All righty, Gina, our first question is from.
it actually looks like.
So we've got kind of a group question here. Okay.
It looks like a lot of people watching
are asking about notices that may have been issued
in certain areas with guidance on how to prepare for crowds
and preventative measures meant to reduce traffic.
Could you give us a little bit
more info on how to best prepare for April 8th?
Sure.
So as you said earlier to hear it along
the path of totality, we have about 31 million
people which I spoke to say it's already crowded to begin with.
And of course, we'll have people
traveling into that area to make it even more crowded.
So, you know,
just think of the preventative measures that you can take
in case you get stuck in traffic.
So make sure you have gas in the tank.
Make sure if
you have a battery operated car, you you've charged up,
you have some extra food and water with you.
If there are traffic lines, you know, just be prepared
to have patience and wait a little bit for that.
Thank you, Gina.
And so we have an our next question is from
a user on Facebook who wants to know what science
will be done during the total solar eclipse.
Right.
The one of the things that we're most excited for it
now is actually performing different science experiments
during the eclipse.
Now, a favorite
that I like to talk about is that we're using NASA's WB 57
high altitude research jet to perform some experiments.
So the goal the jets going to fly across a path of totality
so that
it gets a little bit longer
in totality than if you were just standing on the ground.
And what that means is that the instruments on board
are going to look up at the solar corona and take images
so that we can study the composition of the corona.
Understand how particles are accelerated and charged
and also be able to study dust that is around the sun
that we can't really understand when we look
at just on a day to day basis either.
And so and this is only an experiment
that can be done during a total solar eclipse.
Is that right? Right.
So so we do have instruments called coronagraph
that are essentially artificial eclipses,
and they will block out the sun
so that we can study the corona.
But the way that the light bends around these coronagraph,
we can't actually get deep down into the corona itself
in that lower part of it.
So for the total solar eclipse that happens naturally,
it allows us to get down into the
the lower part of the corona, which means this is one of
the only times that we can study this area of the sun.
That is amazing.
And so we have our next question on Jordan
from Jordan on YouTube.
Who wants to know
why is it bad to view a solar eclipse directly?
Okay. Thanks for that question, Jordan.
So so we want to be really careful about eye safety
during any eclipse or even on a day to day basis.
You don't want to look at the sun
so that you're not causing any permanent damage to your eyes.
Now, the way that it works for a total solar eclipse
is that during the partial phases
you need to have
the proper safety viewing that we just heard about.
You can have the eclipse viewing glasses.
You can make a pinhole projector,
and you need to use that to see the partial eclipse if you are
in the path of totality during totality.
You don't need to have those glasses.
You can look directly up at the sky
and see the sun because it will be blocked.
So you're just looking at that corona.
You're not actually going to be
looking at the sun, but only for totality.
And I have a great follow up from Mouse
seven, five, seven on YouTube.
Who wants to know where is the path of totality for this event?
Okay.
You can go to the NASA's website, go dot NASA.gov,
slash Eclipse Explorer, and it will show you the map
so that you can actually see where totality is located.
But across the U.S., it will stretch beginning down in Texas
all the way through Ohio.
We'll have a station in Cleveland
doing the broadcast, too.
And then up upcoming as well.
Yeah, exactly. And thank you for that.
And then our next question is from Matthew
Henson on YouTube, who asks,
What happens to the moon and the sun as seen from Earth
during the eclipse?
So we have the sun in the sky and the moon will be crossing
in front of the sun.
So when you're when you're looking up
at the sky with your proper safety gear, what you'll see
is that the sun slowly becomes covered by the moon.
And that's the that's our perspective
from the surface of the earth, basically, is that
we're going to see the sun
disappear as the moon moves in front of it.
That is so cool too, that the moon is just the right size,
you know, to cover the sun.
Yes. During this event.
And so we have a lot of Franklin on YouTube.
Who wants to know how long will the eclipse last?
So if you're in the path of totality,
maximum totality will be around four and a half minutes long.
It depends, though, where you even fall within that path.
If you're on the edges, it could be a little shorter.
You want to be kind of
as deep within it as you can,
and then you'll get that maximum totality.
But I will say that this eclipse that we're having coming up
in April totality is lasting longer than it did
in 2017 when we had the eclipse across America as well.
Do you know why?
So it just has to do with kind of where
the moon is in its orbit, how far it is away from the sun.
And for that one in 2017, maximum totality
was only about 2 minutes, a little bit more than that.
So we're almost doubled.
man, that's so that is so cool to know.
So our next question is from a viewer on who wants to know
what tips do you have of taking pictures of eclipses?
Okay.
Well, if you are taking pictures of eclipses during totality,
you can use your phone.
That's fine.
The same way that we can look at the eclipse
with our eyes during totality only.
You can also use your phone to take pictures
now at any other part.
You need to have a proper solar filter
in order to take those photographs.
So not during a partial eclipse. Correct. Yeah.
Any time. Okay.
So our next question is from Ryan on YouTube, who asks,
When was the last eclipse and when is the next one?
Okay.
It depends on how you define eclipse.
So in this context, let's talk about total.
Total eclipse is a total solar eclipse.
So the last one that crosses the US, as I just
mentioned, was in 2017, and I was actually fortunate
enough to see that myself.
So I was really glad to see it. Yeah.
So the next one coming up though, isn't
for another 20 years in the across the U.S.
So you'll have to really
take advantage of this one unless you want to take it
from now. Yeah, absolutely.
And so actually, this is one of my favorite questions.
We have Pouliot on Wilber on YouTube.
Who wants to know, Do animals react in a certain way?
You know,
what are some of these changes that we can expect
during a total solar eclipse? Right.
When when the eclipse is taking place, it really gives
that feeling of dusk and nature reacts as if it is dusk.
So if you have the opportunity to view the eclipse
also in more of a quiet place where you can appreciate nature,
you might be able to see the birds
flying back into the trees to nest for the night,
or you can hear the crickets come out and chirp
and just kind of look around
and watch nature, because it really does
react to to what's going on with the eclipse.
It is so cool to think about to, you know, that this is just
like a multi-sensory experience for everybody.
Right.
And so our next question is another, I'd say,
group question.
We are
getting a lot of questions about the timing of the eclipse
in specific areas around the country.
And, you know, actually,
luckily, NASA's got us covered with that
with an incredible tool to help with just this.
As Gina mentioned
earlier, it’s called the Eclipse Explorer map.
And our friend James Trailie is
back here and he's going to walk
how we're going to use this new map to prepare for April 8th.
Have you ever wondered how to
track a solar eclipse down to the exact second?
NASA has you covered for the April
8th, 2024 for total solar eclipse
that would be sweeping across North America.
I'm James Tralie,
and I'm going to walk you through
how to use NASA's Eclipse Explorer, an interactive
map designed to help you plan your eclipse viewing experience.
This interactive map offers layers of detail that you can
toggle on or off to explore each facet at your own pace.
Visit Go.NASA.gov/ Eclipse Explorer.
Today, I'm showing you how to prepare for the April 8th
total solar eclipse. So let's jump in.
This is the map with the eclipse path.
A menu should appear on the left,
which you can expand or collapse
with this little arrow that you see right here.
With this menu,
you can manipulate the map in a lot of ways.
But I first want to show you how you can look up
what the eclipse will look like in your location
and the timing of when you should look up
with proper eye protection. Of course.
I'm at NASA's Goddard in Greenbelt,
Maryland right now,
so I'm going to type that into our zip code city bar
and hit enter
and it
will snap right to our location, Greenbelt, Maryland.
And you'll notice
when the map zoomed in, it displayed
a box with information about what it will see and when.
In my location,
you can click on the various phases of the eclipse
with these little icons right here
to see what the sun would look like
at different points during the eclipse.
The map also includes information
about the current weather and cloud coverage,
along with a countdown
to the maximum eclipse
and the percent of the sun that will be covered in your area.
If you're located in the path of totality
or you have the chance to see the total solar eclipse,
your information box will have a special feature
when you click on the maximum eclipse.
To demo that,
let me go over to Cleveland, Ohio,
which is in the path of totality.
And snap that up here for you.
So in the spot where we saw
the percent of the sun covered in Greenbelt,
now instead there's the duration of totality,
which for Cleveland is 3 minutes and 49 seconds.
That's when the moon will completely block the sun.
And when I click on the time of totality
and to be precise, for Cleveland,
it's three 13:45 p.m..
You see it snaps directly to what the sun's upper
atmosphere called the corona will look like from Earth.
A total solar eclipse is the only time we can see
this faint region of the sun with our own eyes.
The corona also holds clues for scientists
about the sun's behavior and activity.
Some other cool features include the ability
to use the slider bar that you see right here
to move the moon's shadow across the path of totality.
You can see it sliding like that
on April 8th when the eclipse is happening.
You can select this live button that's right here.
And it will track the eclipse in real time
by clicking the percent coverage.
That's right here. I can zoom out a little bit to show this.
You can see
just how much of the sun
will be covered by the moon in any given area,
even outside that path of totality.
And remember,
it is only safe to look
directly at the sun without eye protection during totality
at all other times, including when the sun isn't blocked
at all.
And during a partial solar eclipse,
you should wear eclipse glasses
or view through an indirect method like a pinhole projector.
For safety tips from NASA.
Visit go.NASA.gov /Eclipse Eyes Safety.
There are many more layers and features to dive into
on the Eclipse Explorer map,
so I encourage you to take a look
to prepare before the total solar
eclipse crosses North America on April 8th.
And join me, along with other NASA's
science communicators and experts on April 8th
for the NASA broadcast starting at 1 p.m.
Eastern time.
We'll be taking you
with us as the eclipse moves across the country.
Thank you and enjoy the total solar eclipse.
Impressive right now.
You can access this map from the comfort of your own home
and witness the eclipse journey in real time on April 8th
by visiting Go.NASA.gov /Eclipse Explorer.
Now, Gina, this map is one way for folks
at home to get involved in the eclipse.
But I understand there are some other ways
that people can play a true hands on role
in this April 8th event.
Can you tell us a little bit more about those? Right.
We have different projects among NASA
where the public can get involved
in order to really contribute to our understanding
of the eclipse and eclipse science.
So two of those projects that I want to talk about,
the first one is Globe Observer, and with Globe Observer,
you download the app to your phone.
You need a thermometer
and what you do is you actually take measurements
before, during and after the eclipse
of the temperature where you are,
you record it in the app. You also take pictures.
It is it's very simple for people at home to do.
You take pictures of cloud coverage as well,
because what that's doing
is it's reporting
the conditions local to you so that we can understand
what changes the sun is actually having on our atmosphere
during the eclipse.
So that's one of the projects where anybody in the public
can get involved.
Now, the other one is called Sun Sketcher,
and this one once again requires an app from your phone
that you download
and you're going to put your phone down
and actually just let it take pictures during the eclipse.
And what it will do is focus on the Bailey's beads that form.
So that's kind of the light that you see
peeking around the moon as it's covering the sun.
And those Bailey beads are the light coming through
kind of the peaks and valleys on the moon,
where it helps us to understand the size of the sun
and the shape of the sun and really kind of
what's going on there with the structure of the sun.
And so with that one, again,
just a simple app that you download.
You leave your phone, go,
and it takes the measurements for you.
I mean, technology these days, you know?
Right.
Like it it just completely fascinates me
that you can do NASA's science from your cell phone.
And if you're interested in learning more
about these projects that Gina just mentioned
or other ways that you can do NASA's Science visit,
go dot nasa.gov forward slash do eclipse science.
Now, Gina,
not only will
we be able to witness
a total solar eclipse on April 8th, I've heard that for
for those in the path of totality,
you could also see some other things in the sky around that.
That's right.
Could you tell us a little bit about what we could expect?
Sure.
So we actually have the opportunity
to see some planets out in the sky during totality,
because when totality occurs, it's going to cover up the sun
and it makes the sky darker.
So we have the opportunity, as you see on the screen here,
to see Jupiter.
Also, Venus, those are going to be
two of the brightest planets in the sky.
But then right along there,
Mercury, Saturn, Mars, those are all faintly visible.
And then even more exciting,
there's a comet that can be visible. Two.
That's come 12P
It's it's faint.
But depending on how dark your area is and whether you
can see it in the sky. Take a look.
And this will be an interesting planetary alignment.
Absolutely.
And I mean, as if this day wasn't, you know,
rare, exciting enough. Now we've got this planetary alignment.
We've got a comet. Right.
And so fingers crossed on clear skies.
Now we have some more questions coming in.
Let's get to a few of them. Sounds good.
All right.
We have Twilight Link on YouTube.
Who asks?
I heard that some eclipse glasses
don't have
the right specifications to protect your eyes properly.
When shopping for glasses, what specifications do I need
that will protect the eyes?
Sure.
When you're
when you're buying those glasses, of course,
you always want to get them from a credible source.
One way to check is there's a standardized number.
It's called the ISO.
You want to look for a number one, two, three, one, two, two.
And I think we have some people
from my NASA team here that can input that in the chart
so that you can make sure
that you're getting those glasses
with the right safety specs as well.
Okay, great.
Thank you.
Thank you for that.
And so our next question is from Antonio
Rabid on YouTube, who asks, Do we need to know?
What do we know
what the weather will be like during the eclipse?
Right.
So the weather will depend on whatever location you're in.
Yeah, but
but we just heard about that
Eclipse Explorer map and that actually has real time
weather information in it
where you go to your location and you can find out
what the weather will be during the eclipse there.
I have a I'd say a good follow up to that
Halloween who all 31 on YouTube asks, Will temperature
change during totality? yes.
So this is something that is
one of the most fun things to experience.
And we experienced this during this.
I know.
It completely blew my mind. Right.
We're shivering up on stage a little bit.
Yeah. The temperature will drop.
You know,
the sun is blocked and the energy,
the heat coming from the sun into the atmosphere,
it changes the atmosphere.
And that's also why we have this Globe Observer
public project that we were talking about
to measure those temperature changes.
So, you know,
there's there's different things that will affect
how much the temperature will change, for instance,
how humid it is in your location,
but you will feel that temperature drop
and it can be as large as 10 to 15 degrees.
Yeah, I mean, even just for what
we experienced with annual, like you said,
I mean, we're like shivering on stage and then for totality
what we expect it to be even a little bit more.
Yeah, probably a little bit more than what we had for annular.
But but even for the annular eclipse,
a majority of the sun was blocked.
So, you know, get chillier in both of those instances.
So I know we touched on this earlier,
but for those of us who are just tuning in and watching,
can you explain again what is the key difference
between an annular solar eclipse and a total solar eclipse?
Right.
And so basically a solar eclipse happens
when the moon crosses in front of the earth,
in between the earth and the sun.
Now, for annular eclipse,
the moon will not be blocking the sun completely.
It's going to leave a ring of fire
because the moon is just a little bit farther
from the earth.
In this case, for the total solar eclipse,
the moon will be slightly closer to the to the earth
and it will block out the sun so that we can see
that upper atmosphere of the sun,
the corona, as the sun is obstructed during that totality.
So so the viewing here that you see on the screen,
that's the main difference in the effects,
whether you get to see the solar corona
or if you're looking at the ring of fire in the sky.
And so we've been touching a lot about,
you know, the path of totality and being in totality
for a total solar eclipse.
And so we've got a few viewers who want to know,
you know
what, if I'm not
in the path of totality, what can I expect on April five?
Yeah.
And, you know, it's just as exciting and spectacular.
If you're not in the path of totality,
you won't get to see the corona because the sun won't be
completely covered,
but you'll still get to experience a partial eclipse.
And depending on where you are,
the amount of that partial eclipse will vary.
You can go to the Eclipse Explorer map
to see just what coverage you have,
but viewing
a partial eclipse
is really exciting too,
and you'll still get
some of those
temperature changes and the changes around you as well.
So whether you're in totality or seeing that partial eclipse,
it's still exciting. Yeah.
So we have Mary Suzman on YouTube.
Who wants to know, will a cell phone disruption expected?
You know, will this affect
any of our communications during the eclipse?
that's a that's a great question.
And so, you know, there is space weather activity
that can disrupt our cell phones when the sun is sending
harmful radiation out into space.
You know,
it can impact the earth's upper atmosphere
and cause minor blips in in cell phone.
However, first of all, we have different things
in place to avoid that.
And specifically during the eclipse,
that's not really something that we have to be worried about.
But I'm glad that people are thinking in that direction.
That's great. Yeah.
And you know,
you mentioned studying space, weather, things like that.
We have another viewer who wants to know
what missions does NASA's have that study, the Sun,
and what mysteries are we hoping to solve?
Okay.
Well, right now, NASA's in the Heliophysics Science division.
We have the Parker Solar Probe Mission.
And this mission
is actually flying into the upper atmosphere of the sun.
So that solar corona that we're talking about viewing
during the eclipse,
Parker actually flies through it and touches it.
And this is the first spacecraft
to ever get this close to the sun.
In fact, on December 24th of this year, it will have its
closest approach flying nine solar radii close to the sun.
And that might sound far, but it's actually the closest
that a spacecraft has ever gotten
so that we can really figure out
how the physics operates in this region.
Okay. Now, nine solar radii.
Can you give us an idea? yeah.
So I'm going to ask my team here to give us some stats on that
and put it in the test just so we can get it
maybe into miles for people to understand. But.
But it is much closer to the sun than we are
so that we can touch the atmosphere there. Awesome.
And so our next question actually, again, has to deal
with the sun and its activity.
It's from Fox McCloud on YouTube.
Who wants to know
what we see solar flares do during the eclipse?
That could very well happen now.
The sun has an 11 year activity cycle where the activity
is ramping up and down, and when it ramps up, we see
more of those solar flares.
We see coronal mass ejections and more.
And right now we are gearing towards solar maximum,
which means we have more of this solar activity happening.
And you can see the explosive flares occurring.
So if we were ever to see some of this activity
during the eclipse,
this would be the time
because we have tons of activity happening.
So fingers crossed with your your solar telescopes
or your viewing that we can see some solar flares erupting.
Is there any certain science
we can only conduct during a total solar eclipse?
This is another viewer on YouTube.
Okay. Right.
So some of the experiments that we have going on with NASA
are things that we can only do during the eclipse.
One project that I'll talk
about is looking at ham radio operations
and actually how the radio signals are impacted
over the atmosphere.
So the radio signals will be sent over the atmosphere.
And during the eclipse, the atmosphere changes.
And what we can do
is have these ham radio operators send their signals
to really understand the impacts of the sun
on the upper atmosphere
and how it might change those radio communications.
And my follow up question, we have Mel on YouTube
who going back to, you know, some eclipse
safety wants to know if we are not in the path of totality,
do you still need to wear those eclipse glasses?
Yes, the short answer is yes.
Actually, if you're not in the path of totality,
you always need to be using those viewing glasses
or kind of your at home products like a calendar
that allows the sun's light to come through the holes.
You can make your own pinhole projection
something that's really easy.
You can just take your hand and
and kind of weave them together to create your own holes
and put it on the ground towards the ground.
You let the sun come through and you look at the ground.
That's one way to see this.
And what are you seeing on the ground then?
At that point,
you'll actually see what looks like the crescent sun's that.
That is the eclipse that's happening.
So you'll see the partial eclipse being projected
onto the ground.
And so my next question is from
okay,
we have somebody that actually has a follow up
to our conversation earlier about the solar flares. Okay.
So they want to know,
are solar flares dangerous to us on Earth?
Great. this is a great question.
So the Earth
has a magnetic field
that shields us from a lot of these, you know, harmful
radiation particles that come from the sun.
So for us, you know,
not first of all,
not every solar flare will be directed towards Earth.
They're direct in all different
directions, towards different planets
or not even towards any planets at all.
The ones that are directed
towards Earth
really are magnetic fields,
and our atmosphere works to shield us
from a majority of those particles.
Now, when we have astronauts in space, we do have
different protective measures that we take to protect them.
We work on predicting when these flares might take place,
when they might arrive,
and our astronauts have radiation covering that.
They can actually shield themselves if they need to.
And so I actually want to stay on that topic.
That's a great follow up,
but I have a great follow up to that topic.
For someone who wants to know, how does the study of the Sun,
I guess, Helio physicists
work with our efforts of sending humans into space
to the moon, you know, and even farther
into the solar system, Right?
Well, personally, some of the research that I do
is on Mars and understanding how the sun impacts Mars.
And we want to understand this because
one day we're aiming to send humans to Mars.
So we really need to understand how this radiation
coming from the sun
or these solar flares that we're talking about,
how they might impact the different planets
we can take data from different NASA's
missions that are studying these planets to really assess
how the atmosphere or a planet's magnetic field
might be impacted by particles coming from the sun.
And then we create tools
that we can use to protect our astronauts
when they go to travel
to other places, such as the moon or Mars.
So another
follow up inspector on YouTube wants to know,
will the International Space Station
be affected by this total solar eclipse then?
If you're for astronauts that are on the space station
during the eclipse,
if it is kind of
crossing over the US region during the time of the eclipse,
the astronauts are able to view it
from a different vantage point.
Now they're looking down at the surface of the earth,
so they would see the moon's shadow moving across earth.
Yeah,
so it's a different perspective than what we're seeing.
You could see it on the screen there.
That's that's from one of the previous eclipses.
That's the moon's shadow actually being cast
onto the surface of Earth.
There you go.
As seen from the space station.
So that's a great view and a unique perspective to have.
That is that is and it's really amazing
that we are able to, you know, have photos
from both the ground and space
with the International Space Station.
And Mary Hart on YouTube wants to know for the total
solar eclipse this year, does NASA's plan
to photograph it from the ground at all? Yes.
So actually, this is something where the public can once again
get involved as long as you have the proper
solar filter and a telescope, you can take pictures of it.
During totality, as we said,
you can use your phone to take pictures of it.
It's safe during totality
to use your phone to take pictures, photographs.
We have amateur astronomers and whatnot as well.
So these are ways that you don't have to be a NASA
scientist to photograph it
as long as you know how to do it safely.
And some of these images are just stunning to look at.
Absolutely.
And I mean, this is another good reminder of the volunteer
project that you mentioned earlier.
Sun sketcher, right,
to where you download,
download an app, put your phone down
and you're able to photograph the eclipse.
Contribute to NASA's science and, you know, enjoy the moment
in the present moment. Yeah. So.
this is a good one.
My next question is what was it like
for you to watch the annular solar eclipse last year?
Well, we were together, so.
I know, I know. That's why I love the page.
I will tell you, my my experience with the annular
eclipse was so much different than the 2017.
Set your first. That was my first year.
That's right. Yeah.
And I will say, viewing it, it almost felt fake.
It didn't seem real
to see the moon kind of coming in the sun.
Yeah.
But on top of that, it was the crowd around us that I remember.
I remember, you know, the minute before and clarity.
People were just so excited and cheering so loudly
that it felt like this experience
that we were all sharing together.
And that was a lot of the fun to it, too.
You know, I think we were talking about
how we got goosebumps during annular.
It was really emotional.
I was not expecting it to be so emotional.
I mean, it was really
just this perspective shift, right, to where you're
you're like, wow, I'm on Earth and we're part of this
larger system that's moving in the universe.
And this will be my first total solar eclipse.
So I'm glad that we get to experience this again together.
Yeah.
So our next question is from Bill Harvard on YouTube.
Who wants to know, will an eclipse like this happen again?
Right.
We will have other total solar eclipses happen.
The next one that will cross across
the United States won't be for another 20 years.
So this will be kind of your last opportunity
for a few decades if you want to see it
within kind of the contiguous U.S.
But eclipses will occur elsewhere.
And, you know, most often it will be over the ocean
just because the earth has more water than land.
But but yeah, we do have total solar eclipse is Now,
one thing that I will add, though, is the moon is slowly
moving away from the earth very slowly,
which means kind of many, many years from now,
there won't be total solar eclipses at Earth once
the moon is far,
far enough away that it can't completely block out the sun.
So it's really special right now that we're able to enjoy this.
But that change will not take place in our lifetime.
Will It will be quite some time until it actually happens.
That is a very fun fact.
That was actually, you know, we have Stephen Pope,
Papa on YouTube who wanted to know,
does that mean in the far future
will eclipses be much different?
And so like you're saying,
there is a day and age where we won't have these
at all anymore. Right.
So we are really here during the right time,
the right moment to witness something like this altogether.
Yeah.
And I mean, the moon, it's moving eight centimeters
per year away. So very, very slow.
We don't have to worry by it.
But if we were on Mars, for example,
Mars has solar eclipses.
When when it's Moon's cross in between Mars and the sun.
However, they're not as fascinating
as our eclipses because they're not total.
It almost looks like a transit of a planet
moving across the sun because it doesn't cover it.
It doesn't cover the sun completely.
So you can just see the moon crossing
and you can almost think of it as an annular eclipse.
But the ring is much bigger than what we see here.
So earlier in the show, you touched on Bailey's beads
and these different different types of things
we might see during today's event.
And we have we have another viewer
that wants to know
about these special features that only happen during a total
solar eclipse.
Can you like the diamond ring effect?
Bailey's beads.
Can you explain those for us? Sure.
So on the surface of the moon, you know, there are craters,
there are peaks, there are valleys.
And when these bailey beads or diamond rings occur,
that's where you see
the light of the sun just kind of piercing through
some of these surface features of the moon and the sun.
The sun
just kind of peaks out in between the peaks in the valleys
so that you can get that shiny diamond ring effect
and and that really helps us to understand
kind of the topography of the moon.
But the moon and and the surface
features have also been studied very well
by NASA's Lunar Reconnaissance Orbiter Mission.
So it's fine to kind of see how we you know,
we make these measurements with our missions,
and then we can also study them during events like the eclipse.
And can you remind us what's the difference
between Bailey's beads and the diamond effect?
Are those the same thing? They're very similar.
Yes. So.
So the diamond ring effect is more of that
kind of wow factor, that brighter shine
where Bailey's beads,
you can see a few of them almost bubbling across
the surface is what it looks like.
So they're similar
and they're caused by similar effects,
but kind of just a difference in their characteristics.
And we have Katie Fisher on Facebook who wants to know,
will the solar total solar eclipse affect the tides?
Okay.
So the total solar eclipse
will not affect the tides really, that that's going to
be affected by the distance that the moon is from the earth.
So so as I said, the moon is slowly moving away
from the earth centimeters every year
now over a greater time scale that will affect the tides,
but not during the total solar eclipse.
And I actually our great team moderating
earlier got us an answer.
You mentioned how Parker Solar Probe.
Great.
On December 24th
is going to make its closest approach to the sun
at about nine solar radii
that is 3.9 million miles.
There we go. Yes, absolutely.
And so our next question is from Lila Coles Avery on Facebook.
Who wants to know, can I look at this safely?
A total solar eclipse through a telescope from North Carolina.
Okay.
So it depends on your location and if you're in the
path of totality.
So check out our Eclipse Explorer map to see
what kind of coverage you'll get if you have to totality,
then you can actually use your telescope to look at the sun
without a filter.
However, if you're in that partial area,
partial eclipse,
then you can use your telescope, but you just need to make sure
that you have that path of totality.
And so as you're looking at the the map here,
showing the path of totality, you know, North
Carolina is going to get that partial eclipse.
So just make sure that you have
a proper filter on your telescope
when you're viewing the eclipse.
Okay.
And still in the same light of viewing, photographing
the eclipse, we have a hat wearing duck on YouTube.
Who asks,
Would it damage my phone camera if I tried to take a timelapse
of the partial eclipse through eclipse glasses?
Okay.
That is one technique that people use is actually.
So you have your eclipse glasses that you can
hold up to your eyes.
Now you can put that in front of your phone
to safely the phone down, put the glasses.
That's what I would recommend. Yeah.
Because
the one thing you don't want to do
is put your glasses onto your phone
and then accidentally, you know, still try to look at the sun
when it's partial.
So you can use those viewing glasses as a filter.
But just be careful.
You know, anytime you're you're doing this.
Absolutely.
And so sticking again, kind of focusing on this
path of totality.
We have James Finn on Facebook who asks,
how dark does it actually get in the path of totality?
It's best described as a dusk feeling.
You'll you'll definitely see the change.
I mean, it's not going to be
completely nighttime because some of the sun's light
will still scattered around the moon and light up
just a little bit of the atmosphere,
but it gets pretty dark.
It's pretty impressive.
Darker than what we saw
for the annular eclipse, that's for sure.
Now, for those of us
who have not witnessed a total solar eclipse before,
you know,
could you
tell us about your experience seeing one for the first time?
My my total solar eclipse.
So I was in Nashville in 2017
with my family and we were
we were kind of off the beaten path in the middle of nowhere.
So we got to really experience
the nature effect, seeing the birds
go to the trees, hearing the crickets come out.
But I do remember once that totality occurred,
we were all just kind of looking at the sky
and getting screaming and getting excited, oohing.
And I think it was it's just something that until you
experience it, it's really hard to imagine, but it's so great.
So it's different than looking at a photo of it
or something like, Yes,
because as we talked about earlier, it is kind of all
the senses, right?
So you're seeing the eclipse, but you're also hearing changes
in nature.
You're feeling the temperature drop
and maybe the winds pick up a little bit.
In fact, during the the 2017
eclipse, in my experience, we had some clouds
start to cover the sky just before totality.
And then as soon as totality
hit, those clouds dissipated and went away.
So we got to see
the changes on the atmosphere with our eyes as well.
And we covered this a little bit before,
but can you tell us
about some of the experiments that Nassar is running
and can only run during a total solar eclipse?
Yes. So so let's talk about the sounding rockets.
That's actually something that we haven't hit on yet.
So we have three sounding rockets that will be launching
from our Wallops Flight facility,
which is in Chincoteague, Virginia.
And these three rockets will be launching
one will take off 35 minutes before totality.
One will take off during totality
and then finally, 35 minutes after.
And what we're trying to study here
is basically measuring directly
the changes in the upper atmosphere,
where the where the rockets are going to reach.
And we're doing it before, during and after.
So we can see the change kind of in how it propagates.
Now, where these rockets are launching,
it's not actually going to be within the path,
but as the moon and its shadow, as the shadow of the moon
is moving across that path,
it's having changes in the local atmosphere
and they kind of propagate out almost like a boat
going through the water and making a wave.
Yeah, it's kind of the same thing.
So we're trying to see
how those changes propagate out in the atmosphere.
So we've got a plane, we've got rocket and that rocket.
Is there any other, you know, instrument
that NASA's planning to use to study the solar cups?
I know last year for the annular, we had balloons.
Is there anything like that?
There are balloon projects, in fact, led by various schools.
We have a ton of balloons that will be launching
science balloons measuring all over.
And so that's something that you see on the screen here.
Some of the students getting ready
for those balloon experiments.
There's also radio telescopes in California
that will be kind of measuring those radio
waves coming from the sun, because any active regions
that are occurring on the sun at that time,
they're going to be covered up by the moon.
So as as the radio telescope is just looking at the sun
and these active regions are covered,
we can see
it's turning them on and off so we can see
where the waves are coming from and where they are
and to to understand what the sources are, basically.
So we're studying this from every single
everything that we can possibly do that is great.
So our next question is from Happy Thumb Gaming on YouTube.
Who wants to know for the solar eclipse?
Will all of the United States be able to view it?
All of the
48 contiguous states will view some sort of eclipse.
If you're in the path of totality,
you'll have the opportunity to view that total solar eclipse.
If you're not in the path of totality,
then that's where you'll see a partial eclipse.
So as long as you're within
those contiguous 48 states, then yes, you can see it
and you hit on this a little bit earlier.
But why does this eclipse
have totality for such a longer duration?
You know,
you mentioned that this year almost double from 2017, Right.
Why is that Right.
The moon's orbit actually isn't circular around the sun.
It's an it's elliptical.
So it all depends on where the moon is in its orbit
and really how close
the moon is or how far it is from from the earth.
And so for this one, compared to 2017,
we're going to get that shadow just cast a little bit
that the path will be a little bit wider.
The shadow is going to really make that eclipse lasts
a little bit longer, just based on where the earth is.
With respect to the Sun
and Burt on YouTube, who wants to know
being so close to the equinox, Why is the path of totality
at such an angle with the equator?
Yeah, so it depends
that the moon's orbit is tilted by five degrees.
And of course that with Earth we have seasons as well.
So there's kind of this game that you have to play between,
you know, the orbit, right, of the Earth and the moon
and how the earth is tilted, how the moon's orbit is tilted,
and it changes kind of the geometry of
where the eclipse occurs and how long and everything.
So earlier, you know, we spoke a little bit about
photographing a total eclipse with a cell phone.
Now we have a viewer on YouTube
who wants to know if pointing a telescope to the sun
will damage the telescope during this event.
Right.
We have filters for telescopes as well.
Solar filters
that you you put on your telescope
so that you can safely view the eclipse.
So that's what I would recommend, especially
if you're in that partial
partial eclipse area.
Now, for the total eclipse, that's when with our own eyes,
we don't need to have the glasses on
and you don't need to have a filter for your eclipse.
But it also depends on on what you're trying to see.
If you're trying to see that corona in a certain light,
you might want a filter for that too.
That allows you to take different types
of images and different science as well.
Okay.
For those just joining us, we have another question
from Scientific potato on YouTube.
Who wants to know, will animals under the total
well, animals under the total solar eclipse be acting weird?
They will be, yes.
Nature changes during the eclipses.
It gets confused.
The nature basically
thinks that the sun is setting and that it's nighttime and
and that's where we kind of have animals getting ready
to go to sleep, birds going to the trees crickets
that come out and chirp.
So that is part of the
whole eclipse viewing experience is to really kind of see
and hear nature around you as well.
You mentioned something to I remember
from the annular eclipse.
The thing about spiders
and they're all there is something with spiders.
I can't remember it off the top of my head, but
I think it has to do with Yeah, there's spiders
coming up and their webs coming up and down too.
That's right.
And so our next question is, is actually from a viewer
on on YouTube who wants to know what advice do you have for
anybody who might be experiencing this solar eclipse
for the first time?
I love this question.
I would say really take a moment
to embrace it and, you know, experience
it with as few distractions as possible.
I mean, I know that we're all excited
to take pictures of the eclipse
to be able to share the experience.
We're lucky that totality lasts for four and a half minutes
because you can have a few moments of quiet
to kind of see and feel and look around.
But then you can also take the photo that you as well.
So I would just say, you know,
make sure you put down all your things and try to enjoy it.
Yeah, exactly.
Well, Gina, unfortunately,
that is all the time that we have for today.
But thank you so much for just joining us
and for answering so many questions from our viewers.
I am so excited to be sharing NASA's stage in carbon taxes
with you in just a few weeks.
Yeah, thanks to Hera.
It was great
being here today and I'm really looking forward
to our broadcast in Kerrville.
And thank you to everyone who joined us online.
We had some fantastic questions today
and really love getting to engage with you live like this.
We hope you enjoyed learning more about the total
solar eclipse and feel better prepared for the upcoming event.
Now make sure you set a reminder to join us on April eight.
We will be streaming the eclipse live from all over
North America following that path of totality
as it sweeps across Mexico, the US and Canada.
There are a variety of ways for you to get involved.
You can watch the NASA broadcast
on multiple streaming platforms, including in Spanish,
by heading over to go.nasa.gov
/eclipse 2024 live.
You can also take a look at NASA's
website to see
if there are eclipse events near you at go.NASA.gov
forward slash eclipse events.
If you'd like to stay updated on all of the latest Sun news
follow NASA's Sun on Facebook and NASA's Sun on X.
Thank you and see you next time.
We are one
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But for all of human culture on Earth,
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that is what stirs humankind.
That's what unites us
now. Experience
the wonder, the beauty and the power of all
stars.
One sun
across space, time and culture.
Let us continue the quest
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and let us continue to find unity in our discovery.