1 00:00:00,400 --> 00:00:01,267 [ ♪ ] 2 00:00:01,300 --> 00:00:03,403 Mars in a Minute 3 00:00:03,436 --> 00:00:05,371 What's inside Mars? 4 00:00:05,404 --> 00:00:08,741 We know a lot about what's inside Earth. 5 00:00:08,774 --> 00:00:11,744 But at Mars, we've only just scratched the surface. 6 00:00:11,777 --> 00:00:15,848 To learn how Mars formed, we have to study its deep interior. 7 00:00:15,881 --> 00:00:18,851 NASA's InSight lander was designed to do just that 8 00:00:18,884 --> 00:00:21,788 by taking the planet's "vital signs." 9 00:00:21,821 --> 00:00:24,490 Listening for its "pulse" or seismic activity, 10 00:00:24,523 --> 00:00:27,160 including any "marsquakes." 11 00:00:27,193 --> 00:00:28,428 Taking its temperature 12 00:00:28,461 --> 00:00:32,198 to see how much heat is flowing out from deep inside; 13 00:00:32,231 --> 00:00:35,334 And checking its "reflexes" to see how much the planet wobbles 14 00:00:35,367 --> 00:00:37,003 as it whips around the Sun. 15 00:00:38,070 --> 00:00:39,072 These all provide clues 16 00:00:39,105 --> 00:00:42,108 to what the planet is really like inside. 17 00:00:42,141 --> 00:00:44,210 So what's inside Mars? 18 00:00:44,243 --> 00:00:45,778 InSight can help us find out 19 00:00:45,811 --> 00:00:47,947 by giving Mars its first thorough checkup 20 00:00:47,980 --> 00:00:51,250 since it formed 4.5 billion years ago. 21 00:00:51,283 --> 00:00:52,351 The more we learn, 22 00:00:52,384 --> 00:00:54,720 the better we'll understand all the rocky planets 23 00:00:54,753 --> 00:00:57,356 -- and the history of our solar system. 24 00:00:57,389 --> 00:00:58,558 NASA Jet Propulsion Laboratory