1 00:00:50,517 --> 00:00:52,552 THE ORBIT TO SHOW WE CAN DEFLECT 2 00:00:52,619 --> 00:00:54,254 IN COMING ASTRONAUTS IF WE NEED 3 00:00:54,320 --> 00:00:56,556 TO BY LEAVING A GROUP THAT ARE 4 00:00:56,623 --> 00:01:01,561 GOING TO MEASURE HOW MUCH CHANGE 5 00:01:01,628 --> 00:01:02,762 AND ALL OVER THE WORLD AND THIS 6 00:01:02,829 --> 00:01:07,267 IS AND NATION SEE ONE POINT OF I 7 00:01:07,333 --> 00:01:10,670 LIGHT AND SHOWS THE CHANGE IN 8 00:01:10,737 --> 00:01:15,208 FRONT OF AND AND TELL HOW 9 00:01:15,275 --> 00:01:17,410 QUICKLY MOVING AROUND AND MAKE 10 00:01:17,477 --> 00:01:20,713 THESE BEFORE AND THE SAME 11 00:01:20,780 --> 00:01:21,815 TECHNIQUE WE USING AFTER TO 12 00:01:21,881 --> 00:01:25,218 DETERMINE HOW MUCH WE CHANGE 13 00:01:25,285 --> 00:01:26,119 ORBIT. 14 00:01:26,186 --> 00:01:28,721 I MAKE MUSIC A LOT OF IT HAS 15 00:01:28,788 --> 00:01:30,223 NOTHING TO DO WITH SCIENCE BUT A 16 00:01:30,290 --> 00:01:32,025 LOT OF IT DOES AND I AM NOT 17 00:01:32,092 --> 00:01:36,329 IMMUNE TO RETURNS BE A THE SONG 18 00:01:36,396 --> 00:01:39,732 EVER ONCE IN AWHILE AND SO WAIT 19 00:01:39,799 --> 00:01:41,034 A SONG ABOUT DART NOTE. 20 00:01:41,101 --> 00:01:41,935 ♪ ♪ 21 00:01:42,001 --> 00:01:49,442 ♪ ♪ 22 00:01:49,509 --> 00:01:51,144 ♪ A LOT OF SCIENCES HAVE A 23 00:01:51,211 --> 00:01:53,246 CREATIVE SLIDE AND A LOT OF US 24 00:01:53,313 --> 00:01:54,047 WRITE. 25 00:01:54,114 --> 00:01:55,648 A LOT OF USP IN BAND. 26 00:01:55,715 --> 00:01:57,350 A LOT WHO PAINT AND WE HAVE THAT 27 00:01:57,417 --> 00:01:59,552 CREATIVE PART OF THE BRAIN HELPS 28 00:01:59,619 --> 00:02:13,399 SCIENCE JUST AS MUCH AS IT DOES. 29 00:02:13,466 --> 00:02:15,401 >> HI EVERYONE. 30 00:02:15,468 --> 00:02:19,606 I AM A PUBLIC AFFAIRS OFFICER 31 00:02:19,672 --> 00:02:22,308 JOINED BY ANDY WHO YOU HAD THE 32 00:02:22,375 --> 00:02:23,109 OPPORTUNITY TO MEET THANKS SO 33 00:02:23,176 --> 00:02:27,714 MUCH FOR JOINING US TODAY. 34 00:02:27,780 --> 00:02:30,617 THAT IS A PLEASURE JOSH THANKS 35 00:02:30,683 --> 00:02:33,419 FOR HAVING ME. 36 00:02:33,486 --> 00:02:34,621 AND THE DART MISSION IF YOU HAVE 37 00:02:34,687 --> 00:02:36,122 A QUESTION WOULD YOU LIKE TO ASK 38 00:02:36,189 --> 00:02:39,626 ABOUT DEFENSE OR DART SEND IT IN 39 00:02:39,692 --> 00:02:41,928 USING ASK NASA OR BY WRITING IN 40 00:02:41,995 --> 00:02:45,031 THE COMMENT BOX AND WHATEVER YOU 41 00:02:45,098 --> 00:02:45,732 ARE WATCHING. 42 00:02:45,798 --> 00:02:47,033 WE LEARNED A LITTLE BIT MORE 43 00:02:47,100 --> 00:02:49,836 ABOUT ARE YOU THE WORK WITH DART 44 00:02:49,903 --> 00:02:52,338 CAN YOU TELL US A BIT MORE WHY 45 00:02:52,405 --> 00:02:55,441 IT IS SO IMPORTANT. 46 00:02:55,508 --> 00:02:56,442 SURE MY PLEASURE. 47 00:02:56,509 --> 00:02:58,444 ASTEROID IMPACTS INTO EARTH ONE 48 00:02:58,511 --> 00:03:01,948 OF THE ONLY NATURAL DISASTER WE 49 00:03:02,015 --> 00:03:05,251 CAN PREDICT FOR AHEAD TAME AND 50 00:03:05,318 --> 00:03:08,254 DO SOMETHING ABOUT AND SO THERE 51 00:03:08,321 --> 00:03:09,856 ARE A FEW WAYS TO COME UP WITH 52 00:03:09,923 --> 00:03:13,293 TO ADDRESS ASTEROID IMPACTS AND 53 00:03:13,359 --> 00:03:14,994 PREVENT THEM FROM HAPPENING AND 54 00:03:15,061 --> 00:03:16,596 DART IS A TEST OF A TECHNIQUE 55 00:03:16,663 --> 00:03:18,998 CALLED KINETIC IMPACTOR WHERE WE 56 00:03:19,065 --> 00:03:23,603 TAKE A SPACECRAFT AND RAM NIGHT 57 00:03:23,670 --> 00:03:24,904 ASTRID AND DOING THAT YOU CHANGE 58 00:03:24,971 --> 00:03:31,110 THE OR BIT OF THE ASTEROID AND 59 00:03:31,177 --> 00:03:32,412 SO SOMETHING COMING OUR WAY WE 60 00:03:32,478 --> 00:03:34,314 COULD MOVE THE ORBIT SO NO 61 00:03:34,380 --> 00:03:36,916 LONGER COMING OUR WAY. 62 00:03:36,983 --> 00:03:37,617 WOW. 63 00:03:37,684 --> 00:03:39,219 A GREAT ANSWER THANK YOU. 64 00:03:39,285 --> 00:03:41,821 I SEE THAT WE ARE STARTING TO 65 00:03:41,888 --> 00:03:43,022 GET QUESTIONS IN FROM THE VIRES 66 00:03:43,089 --> 00:03:46,726 SO GO OUT TO GET STARTED. 67 00:03:46,793 --> 00:03:48,027 IF YOU HAVE A QUESTION YOU CAN 68 00:03:48,094 --> 00:03:51,331 SEND IT IN USING THE #ASKNASA OR 69 00:03:51,397 --> 00:03:59,138 WRITING IN THE COMMENT BOX 70 00:03:59,205 --> 00:04:01,841 THE FIRST QUESTION FROM ROBERT 71 00:04:01,908 --> 00:04:03,943 ON FACEBOOK WHO ASKS, WILL WE BE 72 00:04:04,010 --> 00:04:07,247 ABLE TO KNOW WHAT THE COMMISSION 73 00:04:07,313 --> 00:04:10,250 IS BY LOOKING UP THE LIGHT FROM 74 00:04:10,316 --> 00:04:11,851 IMPACT OF DARK? 75 00:04:11,918 --> 00:04:15,188 THAT IS A GREAT QUESTION. 76 00:04:15,255 --> 00:04:16,789 WE HAVE A GOOD IDEA OF WHAT THE 77 00:04:16,856 --> 00:04:20,393 COMPOSITION IS AND OUR THEORIES 78 00:04:20,460 --> 00:04:23,796 OF HOW FORMS SUGGEST THAT IT 79 00:04:23,863 --> 00:04:27,000 SHOULD BE MADE OF THE SAME 80 00:04:27,066 --> 00:04:31,204 MATERIAL WHEN THE IMPACTED OH 81 00:04:31,271 --> 00:04:34,707 COARSE WE EXPECT TO BE DEBRIS 82 00:04:34,774 --> 00:04:38,211 THROWN OUT INTO SPACE BY THAT 83 00:04:38,278 --> 00:04:41,314 IMPACT AND I DON'T THINK WE ABLE 84 00:04:41,381 --> 00:04:43,116 TO DIRECTLY MEASURE THE 85 00:04:43,182 --> 00:04:45,618 COMPOSITION OF THAT BUT 86 00:04:45,685 --> 00:04:47,720 CERTAINLY DRY THEN PROSECUTOR 87 00:04:47,787 --> 00:04:51,024 MISSION WILL BE SHOWING UP A FEW 88 00:04:51,090 --> 00:04:52,725 YEARS AFTER THE IMPACT AND ABLE 89 00:04:52,792 --> 00:04:56,529 TO DIRECTLY MEASURE THE AND ABLE 90 00:04:56,596 --> 00:04:59,532 TO CONTROL AND A LOT AND 91 00:04:59,599 --> 00:05:00,133 THINKING. 92 00:05:00,199 --> 00:05:03,336 1:00 WE HAVE IDEA OF WHAT IT IS 93 00:05:03,403 --> 00:05:05,338 MADE OF AND WON'T KNOW UNTIL WE 94 00:05:05,405 --> 00:05:07,240 GET THERE, IS THAT CORRECT? 95 00:05:07,307 --> 00:05:07,540 YEAH. 96 00:05:07,607 --> 00:05:08,141 YEAH. 97 00:05:08,207 --> 00:05:08,841 THAT IS CORE RE. 98 00:05:08,908 --> 00:05:12,378 WE THINK THAT IT DIDYMOS IS MADE 99 00:05:12,445 --> 00:05:14,580 OF THE SAME KIND OF MATERIAL OF 100 00:05:14,647 --> 00:05:18,084 ORDINARY METEORITES SO COMMON 101 00:05:18,151 --> 00:05:19,585 MATERIAL FALLS TO ETHER AND THE 102 00:05:19,652 --> 00:05:21,587 SAME KIND OF COMPOSITION THE 103 00:05:21,654 --> 00:05:25,992 ASTEROID HAS AND THE ASTEROID 104 00:05:26,059 --> 00:05:26,592 HAS. 105 00:05:26,659 --> 00:05:28,494 SO IT IS A COMMON MATERIAL THAT 106 00:05:28,561 --> 00:05:34,600 IS WHAT FALLS TO EARTH. 107 00:05:34,667 --> 00:05:36,602 OUR NEXT QUESTION FROM INDY ON 108 00:05:36,669 --> 00:05:39,405 YOUTUBE WHO ASKS WOULD YOU TRY 109 00:05:39,472 --> 00:05:41,808 TO FIND OBJECT WITH HIGHER SO IT 110 00:05:41,874 --> 00:05:48,614 WOULD BE EASIER TO TRACK? 111 00:05:48,681 --> 00:05:50,316 >> WE, SO FOR THOSE THROUGHOUT 112 00:05:50,383 --> 00:05:53,619 THAT ARE NOT FAMILIAR. 113 00:05:53,686 --> 00:05:54,721 IT IS HOW SURFACE IS SO 114 00:05:54,787 --> 00:05:57,323 SOMETHING LIKE SNOW IS 115 00:05:57,390 --> 00:06:00,727 REFLECTIVE AND HIGH AS WE SAY 116 00:06:00,793 --> 00:06:04,931 AND TAR OR CHARCOAL IS LOW AND 117 00:06:04,997 --> 00:06:08,534 AS SUGGESTED HIGH ARE MORE 118 00:06:08,601 --> 00:06:11,337 VISIBLE FROM FAR WAY AND ONE OF 119 00:06:11,404 --> 00:06:12,772 THINK THINGS IN ASTEROID SCIENCE 120 00:06:12,839 --> 00:06:16,376 WE DON'T GET TO PICK WHAT OUR 121 00:06:16,442 --> 00:06:18,778 TARGETS ARE LIKE AND COULD COME. 122 00:06:18,845 --> 00:06:22,782 AND SO IT HAS LBD OF 15 TO 123 00:06:22,849 --> 00:06:28,187 20PERCENT AND TO ROCK AND SO 124 00:06:28,254 --> 00:06:29,489 MANY OTHER GREAT OPPORTUNITY FOR 125 00:06:29,555 --> 00:06:33,292 CARRYING OUT DART IT IS EVEN 126 00:06:33,359 --> 00:06:35,094 REGARDLESS OF IT. 127 00:06:35,161 --> 00:06:41,300 IT IS CLEARLY THE FLIES GO. 128 00:06:41,367 --> 00:06:45,705 OUR NEXT QUESTIONS ARE ON 129 00:06:45,772 --> 00:06:48,207 YOUTUBE WHO ASKS WHAT ARE 130 00:06:48,274 --> 00:06:53,112 DEFLECTIONS ON THE ASTEROID. 131 00:06:53,179 --> 00:06:56,115 THAT IS A GREAT QUESTION. 132 00:06:56,182 --> 00:06:57,116 THE ANSWER IS HOW MUCH WARNING 133 00:06:57,183 --> 00:06:59,519 TIME WE HAVE BEFORE WE HAVE TO 134 00:06:59,585 --> 00:07:05,324 DEFLECT THE ASTEROID. 135 00:07:05,391 --> 00:07:11,531 THE SIZE OF THE OBJECT. 136 00:07:11,597 --> 00:07:12,865 AND DEALING WITH ASTEROID 137 00:07:12,932 --> 00:07:14,167 IMPACTS THEN ONE OF THE OTHER 138 00:07:14,233 --> 00:07:19,872 PIECES IS OBJECTS THROUGHOUT 139 00:07:19,939 --> 00:07:21,073 THAT MAYBE HAZARDOUS. 140 00:07:21,140 --> 00:07:22,775 THE LONGER THE WARNING TIME WE 141 00:07:22,842 --> 00:07:24,477 HAVE THE MORE DIFFERENT OPTIONS 142 00:07:24,544 --> 00:07:29,982 WE HAVE. 143 00:07:30,049 --> 00:07:31,384 WE JUST SAY OK. 144 00:07:31,451 --> 00:07:32,285 IT IS BURNING UP. 145 00:07:32,351 --> 00:07:33,886 WE WILL NOT WORRY ABOUT IT. 146 00:07:33,953 --> 00:07:35,988 WE ARE JUST ENJOYING THE MET ORE 147 00:07:36,055 --> 00:07:40,693 IT MAKES AND MAKE UP LITTLE 148 00:07:40,760 --> 00:07:43,696 PIECES. 149 00:07:43,763 --> 00:07:45,698 DART IS TESTING ONE FORM AND IT 150 00:07:45,765 --> 00:07:48,701 SOUNDS LAKE KEY POINT FOR TO IT 151 00:07:48,768 --> 00:07:51,304 WORK AND NEED A THREAT EARLY. 152 00:07:51,370 --> 00:07:53,606 IT IS THAT CORRECT. 153 00:07:53,673 --> 00:07:54,106 YES. 154 00:07:54,173 --> 00:07:58,511 THAT IS TRUE. 155 00:07:58,578 --> 00:08:00,713 AND THERE ARE OTHER TECHNIQUES 156 00:08:00,780 --> 00:08:03,516 THAT INCLUDE DEFENSE WHICH WOULD 157 00:08:03,583 --> 00:08:07,019 IN FACT GO AND WAIT OUT IN THE 158 00:08:07,086 --> 00:08:09,121 BASEMENT. 159 00:08:09,188 --> 00:08:12,124 AND THE MOST POWERFUL TOOL WE 160 00:08:12,191 --> 00:08:14,060 HAVE BEEN THE TOOLBOX IS TO USE 161 00:08:14,126 --> 00:08:16,462 NUCLEAR DEVICE TO DEALT NATE 162 00:08:16,529 --> 00:08:21,567 NEARBY ASTEROID AND DEFLECT IT 163 00:08:21,634 --> 00:08:22,468 THAT WAY. 164 00:08:22,535 --> 00:08:23,970 THEN, BUT, WE OBVIOUSLY WANTED 165 00:08:24,036 --> 00:08:26,572 TO HAVE AS ANNIE DIFFERENT TOOLS 166 00:08:26,639 --> 00:08:28,774 IN THE TOOLBOX WE CAN AS WE ARE 167 00:08:28,841 --> 00:08:30,676 FACED WITH DIFFERENT SCENARIOS 168 00:08:30,743 --> 00:08:31,777 SO WE WANT TO MAKE SURE WE HAVE 169 00:08:31,844 --> 00:08:33,379 THE CORRECT TOOL FOR THE RIGHT 170 00:08:33,446 --> 00:08:35,982 JOB. 171 00:08:36,048 --> 00:08:38,184 SO FOLLOWING UP ON HOW WE KNOW 172 00:08:38,251 --> 00:08:38,985 IT WILL WORK. 173 00:08:39,051 --> 00:08:40,987 VIDEOGRAPHER ON YOUTUBE ASKS, 174 00:08:41,053 --> 00:08:42,788 WILL WE MEASURE BEFORE AND AFTER 175 00:08:42,855 --> 00:08:43,389 IMPACT? 176 00:08:43,456 --> 00:08:46,192 OR WE WILL ONLY LOOK AT THE 177 00:08:46,259 --> 00:08:47,093 MOMENT OF IMPACT? 178 00:08:47,159 --> 00:08:48,194 HOW WILL WE KNOW THESE 179 00:08:48,261 --> 00:08:50,696 MEASUREMENTS WILL-- HOW WILL 180 00:08:50,763 --> 00:08:54,600 THESE MEASUREMENTS BE TAKEN. 181 00:08:54,667 --> 00:08:56,002 NOR GREAT QUESTION. 182 00:08:56,068 --> 00:08:57,003 ANOTHER GREAT QUESTION OUT 183 00:08:57,069 --> 00:08:57,403 THERE. 184 00:08:57,470 --> 00:08:58,604 FROM THE EARTH. 185 00:08:58,671 --> 00:09:01,007 DIDYMOS ARE GOING TO APPEAR AS 186 00:09:01,073 --> 00:09:02,708 SINGLE POINT OF LIGHT AND NOT 187 00:09:02,775 --> 00:09:04,810 SEE THEM SEPARATE SO WHAT WE CAN 188 00:09:04,877 --> 00:09:06,512 DO AND WHAT WE WILL DO IS 189 00:09:06,579 --> 00:09:10,416 MEASURE THE BRIGHTNESS OF THE 190 00:09:10,483 --> 00:09:13,152 SYSTEM AS IT GOES AROUND AND 191 00:09:13,219 --> 00:09:16,155 FROM HE POINT OF THE VIEW OF THE 192 00:09:16,222 --> 00:09:19,358 EARTH AND MOVE IN FRONT OF AND 193 00:09:19,425 --> 00:09:21,260 MAKE THE BRIGHTNESS GO UP AND 194 00:09:21,327 --> 00:09:22,361 DOWN AS IT DOES THAT AND 195 00:09:22,428 --> 00:09:26,666 MEASURING THAT FOR YEARS PEOPLE 196 00:09:26,732 --> 00:09:29,769 MEASURING IT SINCE 2003 BUT FOR 197 00:09:29,835 --> 00:09:32,471 THE PROJECT SINCE 2019 AND THE 198 00:09:32,538 --> 00:09:35,975 PERIOD OF THAT BIT VERY WELL AND 199 00:09:36,042 --> 00:09:37,076 AFTER THE IMPACT WE KEEP 200 00:09:37,143 --> 00:09:38,878 MEASURING IT AND MEASURING THE 201 00:09:38,945 --> 00:09:40,479 BRIGHTNESS GOING UP AND DOWN AND 202 00:09:40,546 --> 00:09:43,683 MEASURE THE NEW WITH WHICH THE 203 00:09:43,749 --> 00:09:45,384 BRIGHTNESS CHANGES AND COMPARE 204 00:09:45,451 --> 00:09:49,088 TO THAT THE MEASUREMENTS AND BE 205 00:09:49,155 --> 00:09:49,889 ABLE TO SAY, 206 00:09:49,956 --> 00:09:51,891 THE ORBIT PERIOD WAS 11 HOURS 207 00:09:51,958 --> 00:09:54,093 AND 55 MINUTES BEFORE THE IMPACT 208 00:09:54,160 --> 00:09:56,596 AND NOW IT IS 11 HOURS AND 45 209 00:09:56,662 --> 00:09:58,297 MINCE OR 38 MINUTES OR WHATEVER 210 00:09:58,364 --> 00:09:58,898 IT IS. 211 00:09:58,965 --> 00:10:00,199 THAT GIVES US THE INFORMATION WE 212 00:10:00,266 --> 00:10:04,203 NEED TO KNOW HOW MUCH WE CHANGED 213 00:10:04,270 --> 00:10:08,007 THE ORBIT OUR NEXT QUESTION FROM 214 00:10:08,074 --> 00:10:09,408 ALLEN ON FACEBOOK WHO ASKS WHAT 215 00:10:09,475 --> 00:10:10,710 ARE THE CHARACTERISTICS OF THE 216 00:10:10,776 --> 00:10:13,512 SPACECRAFT. 217 00:10:13,579 --> 00:10:16,115 I WELL, THE SPACECRAFT IS 218 00:10:16,182 --> 00:10:17,416 ABOUT THE SIZE OF A VENDING 219 00:10:17,483 --> 00:10:18,517 MACHINE. 220 00:10:18,584 --> 00:10:21,120 NOT COUNTING THE COL SOLAR PANTS 221 00:10:21,187 --> 00:10:22,922 SO IT IS TWO METERS BY TWO 222 00:10:22,989 --> 00:10:24,924 MELTERS BY TWO AND A HALF METERS 223 00:10:24,991 --> 00:10:26,025 OR SOMETHING LIKE THAT. 224 00:10:26,092 --> 00:10:28,928 SO THE SOLAR PANELS WHICH YOU 225 00:10:28,995 --> 00:10:30,329 CAN SEE IN THE VIDEO HERE ARE 226 00:10:30,396 --> 00:10:32,431 ROLLOUTS AND TECHNOLOGIES THAT 227 00:10:32,498 --> 00:10:38,638 ARE TESTED OUT ON DART. 228 00:10:38,704 --> 00:10:40,840 THOSE ARE 18-METERS FROM TIP TO 229 00:10:40,906 --> 00:10:42,642 TIP WHICH IS A LITTLE A LITTLE 230 00:10:42,708 --> 00:10:45,144 BIGGER THAN KIND OF THE LENGTH 231 00:10:45,211 --> 00:10:47,346 OF A TYPICAL BUS AND SO, SO WE 232 00:10:47,413 --> 00:10:49,448 ARE GOING TO TAKE THIS 233 00:10:49,515 --> 00:10:51,450 SPACECRAFT AND IT IS SEVERAL 234 00:10:51,517 --> 00:10:53,352 HUNDRED IN MASS AND A OR 235 00:10:53,419 --> 00:10:55,254 600-KILOGRAMS OF MASS AND GOING 236 00:10:55,321 --> 00:10:59,258 TO IMPACT. 237 00:10:59,325 --> 00:11:03,062 IT IS ABOUT THE SIZE OF ONE OF 238 00:11:03,129 --> 00:11:05,464 AND IMPACT IT LIKE 239 00:11:05,531 --> 00:11:08,668 6.5KILOMETERS SECOND IN UNIT 240 00:11:08,734 --> 00:11:10,069 AND THAT IS SOMETHING LIKE 241 00:11:10,136 --> 00:11:11,470 4-MILES A SECOND. 242 00:11:11,537 --> 00:11:13,506 SO BASICALLY WHERE WE ARE FIRING 243 00:11:13,572 --> 00:11:15,408 THIS AT ONE OF THE PYRAMIDS OF 244 00:11:15,474 --> 00:11:18,611 EGYPT VERY, VERY FAST. 245 00:11:18,678 --> 00:11:20,513 >> SO KIND OF FALL FOLLOWING UP 246 00:11:20,579 --> 00:11:22,114 ON THAT HOW IS IT POSSIBLE THAT 247 00:11:22,181 --> 00:11:23,516 SOMETHING SO SMALL YOU ARE 248 00:11:23,582 --> 00:11:24,917 SAYING THE SIZE OF A VENDING 249 00:11:24,984 --> 00:11:27,119 MACHINE IMPACTING A PYRAMID 250 00:11:27,186 --> 00:11:28,220 EVENTUALLY IN SIZE. 251 00:11:28,287 --> 00:11:29,922 HOW CAN SOMETHING SO SMALL 252 00:11:29,989 --> 00:11:31,524 CHANGE SOMETHING SO BIG AND HOW 253 00:11:31,590 --> 00:11:33,626 CAN THAT CHANGE HOW CAN THAT 254 00:11:33,693 --> 00:11:36,429 CHANGE IN SPACE THE ALTER? 255 00:11:36,495 --> 00:11:41,033 >> THAT IS PART OF THE REASONS 256 00:11:41,100 --> 00:11:47,139 THE OBJECTS MOVE THROUGH SPACE. 257 00:11:47,206 --> 00:11:49,241 20-MILES A SECOND. 258 00:11:49,308 --> 00:11:58,150 IF YOU HAD ENOUGH WARNING TIME. 259 00:11:58,217 --> 00:12:00,252 AND THE FRACTION OF THE INCH PER 260 00:12:00,319 --> 00:12:04,156 SECOND. 261 00:12:04,223 --> 00:12:08,461 AND YOU HAD TWO TRAINS THAT YOU 262 00:12:08,527 --> 00:12:11,864 FLU GOING TO COLLIDE. 263 00:12:11,931 --> 00:12:13,599 IF YOU KNEW IT A DAY BEFORE AND 264 00:12:13,666 --> 00:12:14,700 ONE WOULD HAVE TO CHANGE THE 265 00:12:14,767 --> 00:12:17,403 SPEED BY A LITTLE BIT AND IF YOU 266 00:12:17,470 --> 00:12:21,807 FOUND OUT FIVE MINUTES BEFORE 267 00:12:21,874 --> 00:12:26,512 THEN A DIFFERENT STORY AND TAKE 268 00:12:26,579 --> 00:12:28,814 ACTION SO THE KEY IS FINING IT 269 00:12:28,881 --> 00:12:30,015 EARLY SO YOU CAN MAKE A LITTLE 270 00:12:30,082 --> 00:12:31,917 CHANGE NOT HAVE TO DO ANYTHING 271 00:12:31,984 --> 00:12:42,428 DRASTIC. 272 00:12:42,495 --> 00:12:44,130 I HAVE WON ON SINCE CLOSES TO 273 00:12:44,196 --> 00:12:46,232 BEGINNING AND I THINK IT IS A 274 00:12:46,298 --> 00:12:52,938 LITTLE OVER BASICALLY WAS TWO 275 00:12:53,005 --> 00:13:00,146 PAGE DOCUMENT THAT MY COLLEAGUE 276 00:13:00,212 --> 00:13:04,750 AND COME UP WITH IDEA ON THE AND 277 00:13:04,817 --> 00:13:06,051 THE DA WILL LAST FOR IT. 278 00:13:06,118 --> 00:13:08,053 THEN FROM THERE IT HAS BEEN KIND 279 00:13:08,120 --> 00:13:10,756 OF TAKING THAT TWO PAGE DOCUMENT 280 00:13:10,823 --> 00:13:15,094 AND THEN MAKING IT KNOW AND MORE 281 00:13:15,161 --> 00:13:17,096 SURE AND MORE AND MORE TO BRING 282 00:13:17,163 --> 00:13:19,398 TO IT NASA TO CONVINCE THEM THAT 283 00:13:19,465 --> 00:13:21,200 THIS WAS GOOD THING TO DO THEN 284 00:13:21,267 --> 00:13:23,803 THE ENGINEERS DOING ALL THE WORK 285 00:13:23,869 --> 00:13:24,703 WITH THE HARD WHICH ARE AND 286 00:13:24,770 --> 00:13:25,905 PUTTING IT TOGETHER AND BUILDING 287 00:13:25,971 --> 00:13:27,006 IT THAT HAS BEEN THE LAST FEW 288 00:13:27,072 --> 00:13:30,810 YEARS AND REALLY NATION NOW WE 289 00:13:30,876 --> 00:13:31,710 ARE SEEING THIS THING THAT 290 00:13:31,777 --> 00:13:34,413 STARTED OUT AGAIN AS TWO PAGE 291 00:13:34,480 --> 00:13:37,616 DOCUMENT AND A PIECE OF HARDWARE 292 00:13:37,683 --> 00:13:38,417 THAT IS GOING TO SIT ON TOP OF 293 00:13:38,484 --> 00:13:40,019 THE ROCKET THEN MAKE THE WAY TO 294 00:13:40,085 --> 00:13:44,123 THE ASTEROIDS. 295 00:13:44,190 --> 00:13:45,724 >> I NOTICE YOU SAID THE DOUBLE 296 00:13:45,791 --> 00:13:47,726 ASTEROID PART OF DART OF THE 297 00:13:47,793 --> 00:13:49,728 LAST THREE TESTS THAT WE ARE 298 00:13:49,795 --> 00:13:52,031 GOING TO THIS BINARY ASTEROID 299 00:13:52,097 --> 00:13:52,264 SYSTEM. 300 00:13:52,331 --> 00:13:54,834 CAN YOU TELL ME A BIT ABOUT WHY 301 00:13:54,900 --> 00:13:56,435 THAT IS IMPORTANT? 302 00:13:56,502 --> 00:13:57,837 >> ABSOLUTELY. 303 00:13:57,903 --> 00:14:01,540 AND THE IDEA OF TESTING A 304 00:14:01,607 --> 00:14:03,442 KINETIC IMPACT LIKE DART 305 00:14:03,509 --> 00:14:07,546 PREDATES QUIT A BIT AND IT WAS 306 00:14:07,613 --> 00:14:09,048 FIRST LOOKING INTO IT AND THEN 307 00:14:09,114 --> 00:14:11,350 EARLY YEARS OF THE ENTRY BUT 308 00:14:11,417 --> 00:14:13,085 WHEN THEY CONCEIVED IT AND 309 00:14:13,152 --> 00:14:14,787 VISITING A SINGLE ASTEROID IN 310 00:14:14,854 --> 00:14:16,088 CHANGING THE ORBIT AROUND THE 311 00:14:16,155 --> 00:14:18,791 SUN AND SO, SO, DOING THAT IS 312 00:14:18,858 --> 00:14:20,492 YOU MIGHT IMAGINE IS A PRECISE 313 00:14:20,559 --> 00:14:22,094 MEASUREMENT THAT NEEDS TO BE 314 00:14:22,161 --> 00:14:25,798 MADE AND THEY, THEY ARE SECOND 315 00:14:25,865 --> 00:14:27,199 SPACECRAFT SITTING THERE TO MAKE 316 00:14:27,266 --> 00:14:29,201 THAT MEASUREMENT. 317 00:14:29,268 --> 00:14:32,605 AND THIS WAS MORE SPACECRAFT 318 00:14:32,671 --> 00:14:36,809 THAN THE EUROPEANS WANTED TO 319 00:14:36,876 --> 00:14:38,210 THE PROBLEM AT THE TIME. 320 00:14:38,277 --> 00:14:40,613 SO THE IDEA OF GOING TO A DOUBLE 321 00:14:40,679 --> 00:14:43,215 ASTEROID AND WATCHING THIS 322 00:14:43,282 --> 00:14:44,617 BRIGHTNESS GO UP AND DROWN THE 323 00:14:44,683 --> 00:14:46,719 WREATHER MEANS THAT YOU CAN DO 324 00:14:46,785 --> 00:14:48,621 WILT JUST ONE SPACECRAFT. 325 00:14:48,687 --> 00:14:50,322 YOU DON'T HAVE TO BUILD TWO 326 00:14:50,389 --> 00:14:51,724 SPACECRAFTS TO SEND TWO 327 00:14:51,790 --> 00:14:52,524 SPACECRAFTS. 328 00:14:52,591 --> 00:14:55,427 YOU CAN CHANGE THE ORBIT OF THE 329 00:14:55,494 --> 00:14:56,128 MOON. 330 00:14:56,195 --> 00:14:57,830 THEN, THEN, MEASURE WHAT YOU DID 331 00:14:57,897 --> 00:15:02,635 FROM TELESCOPES ON THE EARTH. 332 00:15:02,701 --> 00:15:04,436 >> SO, SO, KEEPING IN LINE WITH 333 00:15:04,503 --> 00:15:05,437 DART AND THE LAUNCH. 334 00:15:05,504 --> 00:15:07,640 SO MELANIE ON YOUTUBE ASKS, I AM 335 00:15:07,706 --> 00:15:09,541 EXCITED AND I AM SCARED. 336 00:15:09,608 --> 00:15:11,043 WHAT SHOULD I EXPECT ON THE 337 00:15:11,110 --> 00:15:14,079 23rd-24th OF NOVEMBER? 338 00:15:14,146 --> 00:15:16,482 >> WELL, MELANIE, I FEEL YOU. 339 00:15:16,548 --> 00:15:18,284 YOU KNOW, I AM EXCITED AND 340 00:15:18,350 --> 00:15:19,885 SCARED, I THINK THAT IS GOING 341 00:15:19,952 --> 00:15:20,786 AROUND. 342 00:15:20,853 --> 00:15:26,392 SO LAUNCHING OUT OF VANDENBERG 343 00:15:26,458 --> 00:15:29,695 SPACE FORCE BASE AND WE ARE 344 00:15:29,762 --> 00:15:31,897 GOING TO BE ON FALCON 9 ROCKET 345 00:15:31,964 --> 00:15:37,903 AND WE ARE GOING TO LUNCH AND 346 00:15:37,970 --> 00:15:41,006 LATE AT NIGHT SOMETHING LIKE 10 347 00:15:41,073 --> 00:15:42,808 TO 20:00P.M. ON THE WEST COAST 348 00:15:42,875 --> 00:15:44,910 THEN EARLY MORNING WEDNESDAY ON 349 00:15:44,977 --> 00:15:45,811 THE EAST COAST. 350 00:15:45,878 --> 00:15:47,513 THEN THE PLAN. 351 00:15:47,579 --> 00:15:49,815 THEN WE CAN SEE THE VIDEO HERE 352 00:15:49,882 --> 00:15:53,118 AND DART WILL SIM FREIGHT THE 353 00:15:53,185 --> 00:15:56,121 MAIN BASTER THEN SPEND A LITTLE 354 00:15:56,188 --> 00:15:59,525 TIME AND GETTING ITS SOLAR 355 00:15:59,591 --> 00:16:01,827 PANELS EXTENDED AND THEN WE 356 00:16:01,894 --> 00:16:04,930 THINK ABOUT HALF-HOUR 2000 MS TO 357 00:16:04,997 --> 00:16:06,932 HALF-HOUR AFTER THE LAUNCH AND 358 00:16:06,999 --> 00:16:08,634 FIRE THE ROCKETS TO KIND OF GET 359 00:16:08,701 --> 00:16:12,471 ON THE WAY TOWARD DIDYMOS 1:00 360 00:16:12,538 --> 00:16:13,772 WE ARE LOOK FORWARD TO IT. 361 00:16:13,839 --> 00:16:16,976 THEN, YOU KNOW, WE ARE EXCITED 362 00:16:17,042 --> 00:16:19,278 AND I THINK, I THINK, YOU KNOW, 363 00:16:19,345 --> 00:16:20,980 A CRAZY THING WE ARE DOING AND 364 00:16:21,046 --> 00:16:23,482 SO I THINK SCARED IS NOT A 365 00:16:23,549 --> 00:16:26,285 FOREIGN FEELING BUT ALSO FEELING 366 00:16:26,352 --> 00:16:29,788 CONFIDENT. 367 00:16:29,855 --> 00:16:32,191 WE ARE CHATTING FROM NASA'S 368 00:16:32,257 --> 00:16:33,792 AUTOMOBILE ASTEROID TEST MISSION 369 00:16:33,859 --> 00:16:35,294 AND IF WOULD YOU LIKE TO ASK A 370 00:16:35,361 --> 00:16:37,196 QUESTION ABOUT PLANETARY DEFENSE 371 00:16:37,262 --> 00:16:38,597 AT NASA OR THE DART MISSION AND 372 00:16:38,664 --> 00:16:40,699 SEND IT IN USING HASHTAG ASK 373 00:16:40,766 --> 00:16:42,401 NASA OR BY WRITING IN THE 374 00:16:42,468 --> 00:16:44,103 COMMENT BOX WHEREVER YOU ARE 375 00:16:44,169 --> 00:16:45,404 WATCHING TODAY'S BROADCAST SO 376 00:16:45,471 --> 00:16:48,407 OUR NEXT QUESTION COMES FROM 377 00:16:48,474 --> 00:16:51,110 SMITH ON FACEBOOK WHO ASKS-- SO 378 00:16:51,176 --> 00:16:52,411 WILL PIECES OF THE ASTEROID 379 00:16:52,478 --> 00:16:54,313 BREAK OFF AND WILL THEY BECOME 380 00:16:54,380 --> 00:16:56,315 MILLIONS OF LITTLE METEORITES 381 00:16:56,382 --> 00:16:57,816 THAT MAY HIT OUR SATELLITES OR 382 00:16:57,883 --> 00:17:01,220 EVEN OUR PLANET? 383 00:17:01,286 --> 00:17:02,121 GREAT QUESTION. 384 00:17:02,187 --> 00:17:07,026 SOMETHING THAT IS WE LOOKED INTO 385 00:17:07,092 --> 00:17:08,227 OTHERS LOOKED INTO THIS THE 386 00:17:08,293 --> 00:17:09,828 EXPECTATION CERTAINLY IS THAT 387 00:17:09,895 --> 00:17:12,564 WHEN DART HITS AND IT WILL MAKE 388 00:17:12,631 --> 00:17:14,566 DEBRIS THAT DEBRIS WILL COME OFF 389 00:17:14,633 --> 00:17:18,570 OF THE SURFACE. 390 00:17:18,637 --> 00:17:23,575 AND IN FACT, A CUBE SAT THAT THE 391 00:17:23,642 --> 00:17:25,477 ITALIAN SPACE AGENCIES BUILDING 392 00:17:25,544 --> 00:17:27,579 AND HAS BUILT AND ALREADY BUILT 393 00:17:27,646 --> 00:17:33,585 AND DONE. 394 00:17:33,652 --> 00:17:39,191 AND TO ACTUALLY TAKE AND THAT 395 00:17:39,258 --> 00:17:41,093 DART MAKES WHEN IT IMPACTS AND 396 00:17:41,160 --> 00:17:42,694 GIVE US INFORMATION ABOUT IT 397 00:17:42,761 --> 00:17:44,797 ITSELF. 398 00:17:44,863 --> 00:17:46,598 AND THE AMOUNT OF MATERIAL THAT 399 00:17:46,665 --> 00:17:49,701 IS MADE BAY THE DART IMPACT IS 400 00:17:49,768 --> 00:17:53,305 NOT VERY LARGE AND YOU KNOW? 401 00:17:53,372 --> 00:17:56,008 YOU MIGHT REMEMBER THAT OBJECTS 402 00:17:56,075 --> 00:17:58,911 ARE HITTING OBJECTS IN SPACE ALL 403 00:17:58,977 --> 00:18:00,412 THE TIME AND MAKING METEORITES 404 00:18:00,479 --> 00:18:01,713 THEN PEOPLE HAVE STUDIED HOW 405 00:18:01,780 --> 00:18:04,016 MUCH MATERIAL FROM THE DART 406 00:18:04,083 --> 00:18:05,818 IMPACT MAY MAKE THE WAY TO EARTH 407 00:18:05,884 --> 00:18:09,221 AND THE AMOUNT IS MINUSCULE AND 408 00:18:09,288 --> 00:18:10,722 I THINK THE REPORT I REMEMBER 409 00:18:10,789 --> 00:18:12,458 SEEING WAS MAYBE ONE EXTRA 410 00:18:12,524 --> 00:18:15,060 SHOOTING STAR IN YOU THE OVER 411 00:18:15,127 --> 00:18:17,262 THE COURSE OF A DECADE. 412 00:18:17,329 --> 00:18:19,164 SO NOT GOING TO DO ANYTHING THAT 413 00:18:19,231 --> 00:18:20,866 IS GOING TO COME TO EARTH AND WE 414 00:18:20,933 --> 00:18:22,267 ARE NOT GOING TO DO ANYTHING 415 00:18:22,334 --> 00:18:23,569 THAT IS GOING TO BE A PROBLEM 416 00:18:23,635 --> 00:18:32,778 FOR SATELLITES ABOUT THAT. 417 00:18:32,845 --> 00:18:35,481 AND ONCE HASHTAG DART MISSION 418 00:18:35,547 --> 00:18:37,683 AND RESULTS ARE ANALYZED WHAT IS 419 00:18:37,749 --> 00:18:38,283 NEXT. 420 00:18:38,350 --> 00:18:40,486 ARE THEIR MISSIONS OR TARGETS 421 00:18:40,552 --> 00:18:42,488 IDENTIFIED OR WILL THAT COME 422 00:18:42,554 --> 00:18:44,990 LATER? 423 00:18:45,057 --> 00:18:45,390 >> SURE. 424 00:18:45,457 --> 00:18:47,693 AM HAPPY TO ANSWER, YOU NO HE, A 425 00:18:47,759 --> 00:18:52,898 TWITTER QUESTION WITH MY TWEETS. 426 00:18:52,965 --> 00:18:53,999 THE MOST DIRECT IMMEDIATE 427 00:18:54,066 --> 00:18:58,203 FOLLOW-UP TO DART IS WHICH THE 428 00:18:58,270 --> 00:18:59,304 EUROPEAN IS GOING TO BE 429 00:18:59,371 --> 00:19:01,006 LAUNCHING A FEW YEARS AFTER DART 430 00:19:01,073 --> 00:19:04,209 AND THEN WILL ARRIVE AT SYSTEM 431 00:19:04,276 --> 00:19:09,214 AND SHOULD KNOW THIS. 432 00:19:09,281 --> 00:19:11,216 AND WILL DO DIRECT MEASUREMENTS 433 00:19:11,283 --> 00:19:12,451 THAT WILL BE USEFUL ON THEIR OWN 434 00:19:12,518 --> 00:19:15,954 AND DO GREAT SCIENCE THEN DOING 435 00:19:16,021 --> 00:19:18,657 FOLLOW-UP MEASUREMENTS THAT WILL 436 00:19:18,724 --> 00:19:20,459 HELP US CONTINUE TO ANALYZE DART 437 00:19:20,526 --> 00:19:23,262 AND IN TERMS OF THE PLANETARY 438 00:19:23,328 --> 00:19:25,764 DEFENSE OFFICE THE NEXT MISSION 439 00:19:25,831 --> 00:19:29,768 THAT I THINK MOST PEOPLE ARE EX 440 00:19:29,835 --> 00:19:31,370 EXPECTING IS A TELESCOPE MISSION 441 00:19:31,436 --> 00:19:35,174 CALLED SUR SURVEYOR WHICH WILL 442 00:19:35,240 --> 00:19:37,676 GO DOOR TO JOB OF TRYING TO FIND 443 00:19:37,743 --> 00:19:39,178 ASTEROIDS OUT THERE AND TRYING 444 00:19:39,244 --> 00:19:40,579 TO CATALOGING THE ASTEROID 445 00:19:40,646 --> 00:19:43,282 POPULATION AND UNDERSTAND THE 446 00:19:43,348 --> 00:19:45,884 POTENTIALLY HAZE TARRED HAZARD 447 00:19:45,951 --> 00:19:46,885 OUT THERE AND MAKE SURE NOTHING 448 00:19:46,952 --> 00:19:50,889 IS COMING OUR WAY. 449 00:19:50,956 --> 00:19:53,091 SO ON FACEBOOK ASKS, THERE IS 450 00:19:53,158 --> 00:19:54,893 ASTEROID COMING OUR WAY? 451 00:19:54,960 --> 00:19:56,595 IS THERE ASTEROID HEADED TOWARD 452 00:19:56,662 --> 00:19:58,797 EARTH? 453 00:19:58,864 --> 00:19:59,698 >> NO. 454 00:19:59,765 --> 00:20:01,300 NO. 455 00:20:01,366 --> 00:20:05,504 BUT I WILL SAY NO AND WE ARE HIT 456 00:20:05,571 --> 00:20:07,105 BY MATERIAL ALL OF THE TIME. 457 00:20:07,172 --> 00:20:09,508 ANY TIME YOU GO OUT AND BACKYARD 458 00:20:09,575 --> 00:20:11,310 AND SEE A SHOOTING STAR THAT IS 459 00:20:11,376 --> 00:20:14,213 ASTEROID OR COMMENTARY MATERIAL 460 00:20:14,279 --> 00:20:17,516 AND IT IS MAYBE AND THE EARTH 461 00:20:17,583 --> 00:20:19,818 GETS HIT BY OBJECTS THE SIZE OF 462 00:20:19,885 --> 00:20:23,822 THE CHAIR I AM SITTING IN. 463 00:20:23,889 --> 00:20:25,123 AND THE SAME AND MAYBE THREE OR 464 00:20:25,190 --> 00:20:27,626 FOUR TIMES A YEAR DEPENDING ON 465 00:20:27,693 --> 00:20:29,027 THE SIZE OF YOUR COUCH AND WE 466 00:20:29,094 --> 00:20:30,729 GET HIT BY COUCH SIZE MATERIAL 467 00:20:30,796 --> 00:20:33,131 AGAIN AND MAYBE ONCE A YEAR AND 468 00:20:33,198 --> 00:20:35,234 THEN AS YOU GET LARGER AND 469 00:20:35,300 --> 00:20:36,835 LARGER OBJECTS THEY HIT LESS AND 470 00:20:36,902 --> 00:20:41,740 LESS AND SO THAT GAINS PART OF 471 00:20:41,807 --> 00:20:45,544 THE REASON THAT WE ARE WANNING 472 00:20:45,611 --> 00:20:46,845 TO SEND OUT TO LOOK FOR MATERIAL 473 00:20:46,912 --> 00:20:48,747 AND OBJECTS THAT MAY BE LARGER 474 00:20:48,814 --> 00:20:50,649 ENOUGH TO WORRY ABOUT COMING OUR 475 00:20:50,716 --> 00:20:50,949 WAY. 476 00:20:51,016 --> 00:21:05,564 WOE KNOW OF NO OBJECTS THAT ARE 477 00:21:05,631 --> 00:21:07,466 LARGE ENOUGH TO CAUSE DAMAGE. 478 00:21:07,532 --> 00:21:09,768 HOW LONG WILL IT TAKE DOOR GET 479 00:21:09,835 --> 00:21:12,170 TO THE DIDYMOS. 480 00:21:12,237 --> 00:21:15,207 WELL, UM SHALL GREAT QUESTION. 481 00:21:15,274 --> 00:21:19,911 DART WILL ARRIVE IN THE END OF 482 00:21:19,978 --> 00:21:24,216 SEPTEMBER TO THINK START OF 483 00:21:24,283 --> 00:21:27,319 OCTOBER IN 2022. 484 00:21:27,386 --> 00:21:30,022 THE DATE DEPEND ON THE DATE OF 485 00:21:30,088 --> 00:21:32,824 LAUNCH. 486 00:21:32,891 --> 00:21:34,026 IS THE LAST WEEK OF SEPTEMBER 487 00:21:34,092 --> 00:21:35,727 TOP THE FIRST COUPLE OF DAYS OF 488 00:21:35,794 --> 00:21:36,228 OCTOBER. 489 00:21:36,295 --> 00:21:40,932 OUR LAUNCH PERIOD IS A LONG ONE. 490 00:21:40,999 --> 00:21:42,434 A WEAK FROM TOMORROW IS THE 491 00:21:42,501 --> 00:21:45,537 FIRST AND THE FIRST OPPORTUNITY 492 00:21:45,604 --> 00:21:49,641 TO LAUNCH CRAZY. 493 00:21:49,708 --> 00:21:57,549 AND A FEW MONS FROM NOW. 494 00:21:57,616 --> 00:22:00,652 AND STILL RIFE AND IN THAT LATE 495 00:22:00,719 --> 00:22:04,456 SEPTEMBER AND OCTOBER. 496 00:22:04,523 --> 00:22:07,159 >> KCTV MONDAY ON FACEBOOK ASKS 497 00:22:07,225 --> 00:22:09,161 CAN YOU PREDICT THE NEW 498 00:22:09,227 --> 00:22:10,762 TRAJECTORY ON THE COLLISION OF 499 00:22:10,829 --> 00:22:13,498 DART? 500 00:22:13,565 --> 00:22:22,507 >> UM, THE TRAJECTORY OF IS, THE 501 00:22:22,574 --> 00:22:26,011 NEW TRAJECTORY IS ORBIT IS WHAT 502 00:22:26,078 --> 00:22:28,814 WE ARE HOPING TO MEASURE AND 503 00:22:28,880 --> 00:22:29,915 GIVE IN THE OPPORTUNITY OF 504 00:22:29,981 --> 00:22:32,017 MOMENTUM WE THINK WE ARE BRING 505 00:22:32,084 --> 00:22:33,719 IN OR SURE WE ARE BRING IN THEN 506 00:22:33,785 --> 00:22:35,420 GIVEN THE WAY WE THINK THAT IT 507 00:22:35,487 --> 00:22:38,323 WILL ACT WHEN WE HIT IT AND THE 508 00:22:38,390 --> 00:22:39,825 AMOUNT OF MATERIAL WE THINK IT 509 00:22:39,891 --> 00:22:41,526 THROWS OFF AND EXPECTING TO 510 00:22:41,593 --> 00:22:43,228 CHANGE THE PERIOD BY SOMETHING 511 00:22:43,295 --> 00:22:44,930 LIKE TEN MINUTES BUT IT COULD BE 512 00:22:44,996 --> 00:22:48,233 20 OR COULD BE 30 AND WE DON'T 513 00:22:48,300 --> 00:22:52,037 THE IT COULD BE LESS TEN. 514 00:22:52,104 --> 00:22:53,538 AND WE ARE NOT AND GOING TO BE 515 00:22:53,605 --> 00:22:55,440 MAKE IT SMALLER ORBIT AS SHOWN 516 00:22:55,507 --> 00:22:57,542 IN THIS ANIMATION HERE. 517 00:22:57,609 --> 00:22:58,844 WE KNOW WE ARE GOING TO MAKE 518 00:22:58,910 --> 00:23:00,846 ORBIT A LITTLE BIT SMALLER. 519 00:23:00,912 --> 00:23:02,247 AND WE DON'T THINK WE GOING TO 520 00:23:02,314 --> 00:23:06,051 ABLY LANG THE ORBIT OF DIDYMOS 521 00:23:06,118 --> 00:23:07,152 AROUND THE SUN. 522 00:23:07,219 --> 00:23:07,853 I DON'T THINK. 523 00:23:07,919 --> 00:23:08,954 WE ARE CONFIDENT WE ARE NOT 524 00:23:09,020 --> 00:23:09,855 GOING TO CHANGE THAT. 525 00:23:09,921 --> 00:23:10,856 IN FACT WE ARE NOT GOING TO MAKE 526 00:23:10,922 --> 00:23:13,191 A CHANGE THAT IS THAT IS 527 00:23:13,258 --> 00:23:14,793 MEASURABLE COMPARED TO OUR 528 00:23:14,860 --> 00:23:17,596 CURRENT KNOWLEDGE OF THE ORBIT. 529 00:23:17,662 --> 00:23:19,798 SO THE SYSTEM AROUND THE SUN AND 530 00:23:19,865 --> 00:23:23,301 NOT GOING TO CHANGE. 531 00:23:23,368 --> 00:23:25,203 >> AND SPEAK OF THIS ASTEROID 532 00:23:25,270 --> 00:23:28,206 SYSTEM AND THE KINETIC IMPACT 533 00:23:28,273 --> 00:23:30,909 AND ROBBERS ON FACEBOOK ASKS WHY 534 00:23:30,976 --> 00:23:32,611 NOT TEST OUR THEORY ON ASTEROID 535 00:23:32,677 --> 00:23:34,012 THAT DOES NOT POSE A THREAT SO 536 00:23:34,079 --> 00:23:36,214 WE CAN MEASURE THAT REACTION? 537 00:23:36,281 --> 00:23:37,516 I THINK YOU MAY HAVE SOME 538 00:23:37,582 --> 00:23:39,518 CLARIFYING INFORMATION HERE. 539 00:23:39,584 --> 00:23:41,219 >> WELL, YEAH. 540 00:23:41,286 --> 00:23:45,524 IT IS NOT A THREAT. 541 00:23:45,590 --> 00:23:47,826 AND INTERCEPT THAT AND NOT 542 00:23:47,893 --> 00:23:49,227 CHANGE TO IT DO THAT. 543 00:23:49,294 --> 00:23:53,932 PART OF THE CONFUSION OR THERE 544 00:23:53,999 --> 00:23:59,037 IS POTENTIAL FOR CONFUSION AND A 545 00:23:59,104 --> 00:24:06,044 GROUPING THAT ARE CALLED 546 00:24:06,111 --> 00:24:08,547 HAZARDOUS AND EVEN THOUGH THEY 547 00:24:08,613 --> 00:24:11,349 ARE ALL CALLED AND ASTEROIDS AND 548 00:24:11,416 --> 00:24:14,686 THEY ARE NOT ACTUALLY HAZARDOUS 549 00:24:14,753 --> 00:24:16,087 IN THE WAY THEY USE THE TERM. 550 00:24:16,154 --> 00:24:21,092 SO ORBIT NOT CLOSE ENOUGH IT IS 551 00:24:21,159 --> 00:24:23,295 ACTUALLY GOING TO BE A THREAT TO 552 00:24:23,361 --> 00:24:29,401 EARTH NO MATTER WHAT. 553 00:24:29,468 --> 00:24:31,603 >> WILL NASA BE ABLE TO CONTROL 554 00:24:31,670 --> 00:24:33,505 TRAJECTORY OR ENTIRELY RELAY AND 555 00:24:33,572 --> 00:24:42,314 ON SMART APP AND IT IS OUR 556 00:24:42,380 --> 00:24:45,217 NAVIGATION SYSTEM THAT WILL 557 00:24:45,283 --> 00:24:49,321 BRING UNITED STATES. 558 00:24:49,387 --> 00:24:53,925 AND NOT OPERATING UP UNTIL THEN 559 00:24:53,992 --> 00:24:59,631 AND THERE WILL BE TYPICAL FOR 560 00:24:59,698 --> 00:25:02,934 OUR MISSION AND UNDERSTANDING 561 00:25:03,001 --> 00:25:05,737 AND NOT ENGINEER AND NOT GOING 562 00:25:05,804 --> 00:25:12,377 TO SCREW THIS UP. 563 00:25:12,444 --> 00:25:14,679 THERE IS NO PLAN TO INTERVENE. 564 00:25:14,746 --> 00:25:17,282 SO WE THINK DO THE JOB IN THE 565 00:25:17,349 --> 00:25:20,385 LAST FEW HOURS. 566 00:25:20,452 --> 00:25:26,491 AND DO THIS. 567 00:25:26,558 --> 00:25:28,493 WILL THE LOSS OF THE CRASHING 568 00:25:28,560 --> 00:25:29,995 ASTEROID AFFECT TRAJECTORY OF 569 00:25:30,061 --> 00:25:36,301 THE OTHER ASTEROID? 570 00:25:36,368 --> 00:25:37,002 OH, YEAH. 571 00:25:37,068 --> 00:25:39,204 WE ARE NOT GOING TO DESTROY AND 572 00:25:39,271 --> 00:25:41,806 IT IS, IT IS GOING TO WE ARE 573 00:25:41,873 --> 00:25:43,008 GOING TO MAKE CRATER AND THINK 574 00:25:43,074 --> 00:25:44,409 THE CRATER WILL BE SOMETHING 575 00:25:44,476 --> 00:25:46,511 LIKE 1 A METER IS A CROSS BE A 576 00:25:46,578 --> 00:25:48,513 THE WHOLE OBJECT IS 160 OR MORE 577 00:25:48,580 --> 00:25:50,916 METERS ACROSS AND THEN IT IS 578 00:25:50,982 --> 00:25:57,022 THAT DISTANCE DEEP, TOO THEN 579 00:25:57,088 --> 00:26:01,526 AGAIN HITTING WITH THE VENDING 580 00:26:01,593 --> 00:26:03,228 MACHINE THEN KIND OF YOU KNOW, 581 00:26:03,295 --> 00:26:05,130 NO MATTER HOW HARD WE THROW THE 582 00:26:05,196 --> 00:26:06,932 VENDING MACHINE AT THE PYRAMIDS 583 00:26:06,998 --> 00:26:09,034 WE NOT GOING TO DO MORE THAN 584 00:26:09,100 --> 00:26:14,973 MAKE A MESS OF THE SURFACE. 585 00:26:15,040 --> 00:26:20,078 SO WILL BE FINE AND MY AGAIN 586 00:26:20,145 --> 00:26:21,680 AFTER IT AFTER US. 587 00:26:21,746 --> 00:26:23,381 WE'LL BE OK. 588 00:26:23,448 --> 00:26:25,083 >> SO WE HAVE TIME FOR ONE MORE 589 00:26:25,150 --> 00:26:25,884 QUESTION. 590 00:26:25,951 --> 00:26:27,185 THEN I HOPE YOU CAN TELL AS YOU 591 00:26:27,252 --> 00:26:28,587 BIT MORE ABOUT THE CAREER AND 592 00:26:28,653 --> 00:26:31,790 THE TL SOUNDS FASCINATING. 593 00:26:31,856 --> 00:26:33,391 AM CURIOUS IF CUE TELL AS YOU 594 00:26:33,458 --> 00:26:34,993 BIT MORE OF HOW YOU GOT TO WHERE 595 00:26:35,060 --> 00:26:37,295 YOU ARE NOW AND ANY ADVICE FOR 596 00:26:37,362 --> 00:26:40,599 THOSE WATCHING HERE TODAY. 597 00:26:40,665 --> 00:26:40,832 >> SURE. 598 00:26:40,899 --> 00:26:41,199 SURE. 599 00:26:41,266 --> 00:26:42,901 FREE ADVICE WHERE EVERYTHING IS 600 00:26:42,968 --> 00:26:44,402 THEY SAY. 601 00:26:44,469 --> 00:26:47,205 I STARTED OUT AND ALWAYS LOVED 602 00:26:47,272 --> 00:26:49,007 SPACE AND EVER SINCE I WAS KID. 603 00:26:49,074 --> 00:26:50,609 ONE OF THE FIRST MEMORIES WITH 604 00:26:50,675 --> 00:26:52,210 AS THE VIKING LANDING ON MARS 605 00:26:52,277 --> 00:26:53,812 AND SIX OR SEVEN YEARS OLD AND 606 00:26:53,878 --> 00:26:55,413 THE NEWSPAPERS THEN GETTING INTO 607 00:26:55,480 --> 00:26:57,916 SPACE THEN AND FOLLOWING IT 608 00:26:57,983 --> 00:27:00,518 AVIDLY SINCE AND I WENT TO 609 00:27:00,585 --> 00:27:04,823 UNDERGRADUATE AT MIT AND 610 00:27:04,889 --> 00:27:06,825 PLANETARY SCIENCE THEN I KNEW 611 00:27:06,891 --> 00:27:08,827 THEN I WAS PLANET GIANT THEN 612 00:27:08,893 --> 00:27:10,729 ASTEROID GUY AND NOT A GALAXY 613 00:27:10,795 --> 00:27:15,867 AND KIND OF GIANT THEN TO 614 00:27:15,934 --> 00:27:18,269 GRADUATE SCHOOL IN TUCSON AND I 615 00:27:18,336 --> 00:27:20,972 MET UP A GREAT FOLK AND THE 616 00:27:21,039 --> 00:27:25,276 GREAT FOLKS AND THEN MADE THE 617 00:27:25,343 --> 00:27:27,879 WAY BACK TO MIT AND AS RESEARCH 618 00:27:27,946 --> 00:27:28,880 STRINES AND THEN FROM THERE I 619 00:27:28,947 --> 00:27:33,985 HAVE BEEN AT ATL SINCE 20 AND 620 00:27:34,052 --> 00:27:35,286 VIEWS I WOULD GIVE ANYONE IN 621 00:27:35,353 --> 00:27:36,788 SCIENCE IS TO KEEP YOUR 622 00:27:36,855 --> 00:27:39,691 NONSCIENCE HOBBIES TO KEEP YOU 623 00:27:39,758 --> 00:27:44,796 FRESH. 624 00:27:44,863 --> 00:27:47,399 AND GET AND PUNCHED OVER TO YOUR 625 00:27:47,465 --> 00:27:50,902 CODE OR YOUR TELESCOPE SO JUST 626 00:27:50,969 --> 00:27:56,708 HOLD ON IF YOU CAN. 627 00:27:56,775 --> 00:27:58,910 OR YOUR SKETCHING AND YOUR 628 00:27:58,977 --> 00:28:01,513 CRAFTS YOU KNOW? 629 00:28:01,579 --> 00:28:05,016 THAT WOULD BE MY ADVICE. 630 00:28:05,083 --> 00:28:06,418 THANKS SO MUCH FOR YOUR TIME AND 631 00:28:06,484 --> 00:28:07,118 JOINING US TODAY. 632 00:28:07,185 --> 00:28:09,821 IT HAS BEEN A PLEASURE. 633 00:28:09,888 --> 00:28:11,122 >> THANKS AGAIN FOR HAVING ME. 634 00:28:11,189 --> 00:28:12,223 THANKS FOR ALL THE GREAT 635 00:28:12,290 --> 00:28:13,858 QUESTIONS. 636 00:28:13,925 --> 00:28:15,360 GO DART. 637 00:28:15,427 --> 00:28:15,960 >> GO DART. 638 00:28:16,027 --> 00:28:17,362 THANK YOU ALL FOR WATCHING FROM 639 00:28:17,429 --> 00:28:18,263 HOME. 640 00:28:18,329 --> 00:28:19,764 YOU CAN KEEP UP WITH AS? DART 641 00:28:19,831 --> 00:28:21,566 MISSION ON SOCIAL MEDIA BY USING 642 00:28:21,633 --> 00:28:23,668 THE HASHTAG DART MISSION. 643 00:28:23,735 --> 00:28:25,770 AND YOU CAN FOLLOW NASA SOLAR 644 00:28:25,837 --> 00:28:27,772 SYSTEM ON TWITTER, FACEBOOK AND 645 00:28:27,839 --> 00:28:29,174 INSTAGRAM. 646 00:28:29,240 --> 00:28:30,475 YOU CAN KEEP UP WITH ALL OF 647 00:28:30,542 --> 00:28:32,477 NASA'S ASTEROID RELATED 648 00:28:32,544 --> 00:28:34,379 PLANETARY DEFENSE NEWS BY 649 00:28:34,446 --> 00:28:35,780 FOLLOWING ASTEROID WATCH ON 650 00:28:35,847 --> 00:28:37,682 TWITTER AND FOR ALL THE LATEST 651 00:28:37,749 --> 00:28:41,286 NEWS ON DART, VISIT NASA.GOV 652 00:28:41,352 --> 00:28:41,986 SLASH DART. 653 00:28:42,053 --> 00:28:43,588 FINALLY, BE SURE THAT WATCH 654 00:28:43,655 --> 00:28:45,390 DOOR'S LAUNCH CURRENTLY SCHEDULE 655 00:28:45,457 --> 00:28:46,991 FOR NOVEMBER24th AT 656 00:28:47,058 --> 00:28:49,594 1:20A.M. EASTERN TIME. 657 00:28:49,661 --> 00:28:51,096 THANK ALL AGAIN FOR JOINING US 658 00:28:51,162 --> 00:28:51,496 TODAY. 659 00:28:51,563 --> 00:29:01,539 KEEP LOOKING UP.