The Universe: Nemesis - The Sun's Evil Twin

00:00:00 In the beginning, there was darkness, and then-- Bang--

00:02:17 years ago was because a comet slammed into the Earth.

00:04:19 If this star is discovered, it is so important.

00:06:16 Just as mammals survived and thrived after the fiery death of

00:08:08 slowly falls in toward the Sun.

00:09:27 catch.

00:11:08 That there is a star orbiting the Sun in a 26-million-year

00:13:02 After all, when we look at the sky, we only see one sun.

00:14:45 In other words, when viewed from Earth, most nearby objects

00:17:04 So Tami's going to help illustrate that.

00:19:04 In the hunt for an evil twin to our Sun that

00:21:01 survey might help find Nemesis by exploiting the infrared

00:22:22 Being in that race car was really exciting.

00:23:31 tire because there was more pressure on it during the turns.

00:25:39 The objects that are millions of light years away that

00:27:52 comets are coming from, their directions tend to concentrate

00:29:51 perpetrator?

00:31:59 comets, send them crashing in in these periodic extinctions--

00:33:56 In addition to being in an unexpectedly distant region

00:35:49 It brushed up against a mysterious force that shoved it

00:37:52 But then Sedna got a little bit close to one of the planets.

00:39:55 If that is correct, future generations will be faced with a

00:41:56 in the crosshairs of this comet storm for a million years.

02:00:00 made an historic discovery when