1 00:00:07,130 --> 00:00:05,780 how do you get to Mars if you want to 2 00:00:09,350 --> 00:00:07,140 send a spacecraft all the way to Mars 3 00:00:11,209 --> 00:00:09,360 first we'll need a fast rocket to escape 4 00:00:12,919 --> 00:00:11,219 the pull of Earth's gravity the heavier 5 00:00:15,650 --> 00:00:12,929 your spacecraft the more powerful your 6 00:00:17,540 --> 00:00:15,660 rocket needs to be to liftoff next make 7 00:00:18,769 --> 00:00:17,550 sure you launch at the right time Mars 8 00:00:20,990 --> 00:00:18,779 and Earth orbit the Sun at different 9 00:00:22,519 --> 00:00:21,000 speeds and distances sometimes they're 10 00:00:24,679 --> 00:00:22,529 really far apart and other times they 11 00:00:26,300 --> 00:00:24,689 come closer together about every two 12 00:00:28,130 --> 00:00:26,310 years the two planets are in perfect 13 00:00:30,290 --> 00:00:28,140 positions to get to Mars with the least 14 00:00:32,979 --> 00:00:30,300 amount of rocket fuel that's important 15 00:00:35,690 --> 00:00:32,989 the total trip is over 300 million miles 16 00:00:37,190 --> 00:00:35,700 finally make sure your aim is right you 17 00:00:38,959 --> 00:00:37,200 can't shoot for where Mars is at launch 18 00:00:41,090 --> 00:00:38,969 time you have to aim for where it will 19 00:00:43,549 --> 00:00:41,100 be when you get there it's a lot like 20 00:00:45,770 --> 00:00:43,559 how a quarterback passes a football also 21 00:00:47,150 --> 00:00:45,780 you may need a few frust to correct your 22 00:00:50,090 --> 00:00:47,160 direction along the way so you don't 23 00:00:51,439 --> 00:00:50,100 miss Mars if all goes well you'll get to 24 00:00:53,810 --> 00:00:51,449 the red planet in about seven or eight 25 00:00:55,279 --> 00:00:53,820 months then if you actually want to land