[Lively music]
[Narrator] What's Up for February?
The best time to spot Mercury,
Mars disappears,
and what's going on with Betelgeuse?
The first week or so of February is a good time
to try and spot the planet Mercury.
The innermost planet will be at its highest elevation
above the horizon for the year,
for viewers in the Northern Hemisphere.
Look very low in the west about half an hour after sunset.
The best viewing is at the end of the first week,
around Feb. 6th and 7th,
when the planet will be at its brightest.
[whoosh]
On the morning of February 18th, skywatchers in North America
can watch as Mars disappears
behind the Moon for about an hour,
in an event called an occultation.
Moon-Mars occultations are visible from somewhere on Earth
about twice per year.
But like eclipses, you have to be in the right place
at the right time to catch them.
The pair have to be high enough in the sky to be easily seen,
and if it's after sunrise where you are,
you'll need a telescope.
For viewers in the Eastern time zone,
the occultation begins soon after local sunrise,
but you may be able to see
Mars disappearing behind the Moon
with a telescope or good binoculars.
And it's still worth looking just before dawn to see Mars
extremely close to the crescent Moon.
Observers in the Central time zone will be able to watch the
beginning of the occultation in the predawn sky,
as Mars slips behind the Moon.
The end of the occultation takes place after sunrise for you.
The Mountain time zone has the best viewing,
as both the beginning and end of the occultation
take place in your sky before dawn.
(Although the pair will be close to the horizon
at the start of the event.)
And in the Pacific time zone,
you'll be able to see
the end of the occultation,
as Mars pops back into view
from behind the Moon's dark side.
You'll just need a clear view
low in the southeast sky to see it.
Finally this month, there's been lots of interest lately
in the left shoulder of Orion —
specifically the bright, red giant star known as Betelgeuse.
In late 2019, Betelgeuse — which is normally one of the
brightest stars in the sky — dimmed quite a bit.
Since this massive star is known to be of the type that
eventually ends its life in a supernova explosion,
many folks have wondered
if the recent dimming is a warning
that Betelgeuse is about to blow.
Well, astronomers say, "Don't hold your breath."
Although it could explode tomorrow,
astronomers think it's more likely
to happen on a longer timeline,
probably more like 100,000 years from now,
and it's unlikely to signal its demise in advance.
Fortunately, Betelgeuse is far enough away
that when it does go supernova,
we won't experience any negative effects from it,
like radiation.
But it will be quite brilliant in the skies for weeks.
[whoosh]
Here are the phases of the Moon for February.
You can catch up on all of NASA's current
and future missions at nasa.gov.
I'm Preston Dyches from NASA's Jet Propulsion Laboratory,
and that's What's Up for this month.