Alien Planets Revealed

00:00:07 NARRATOR: Hundreds of billions of stars in our galaxy.

00:03:08 NARRATOR: The most ambitious planet-hunter ever built sits on a launch pad

00:05:40 but it's an ocean not of water but of molten lava.

00:08:05 Every single tiny dot that you see is a star

00:10:16 and the more the light dims.

00:12:41 To answer that, we have to go back to the basics

00:14:53 another Earth-like planet elsewhere in the universe.

00:17:18 and in the Atacama Desert in Chile

00:19:04 it's going around quite rapidly.

00:21:39 Smaller planets like Earth are primarily rocky

00:23:45 the mass of the planet

00:25:49 It's the perfect planet for a paddle.

00:28:11 ten to the 19th planets in our galaxy

00:30:22 NARRATOR: While scientists can speculate about life on Kepler-22B

00:33:02 you can get close enough to the star

00:35:08 are expected to be the highest.

00:37:16 What we see here are different kinds of bacteria

00:39:14 about what life might look like on another planet

00:41:14 passing in front of a star the size of our Sun.

00:43:23 NARRATOR: The planet, today confirmed as Kepler-62f

00:45:44 so with column-like legs to support their increased weight.

00:47:55 SELLERS: After the evolutionary process is finished

00:50:20 I believe there is intelligent life out there

00:52:44 Could there be extraterrestrial life in our own solar system?