Inside the Milky Way

00:00:05 The Milky Way galaxy...

00:05:06 The other main class is the so-called "spiral galaxies,"

00:09:21 our galaxy's downtown district.

00:14:27 But there's something strange about this gas and dust.

00:18:29 Nebulas house baby stars in every spiral arm of the galaxy.

00:23:07 The Crab Nebula is a fascinating object.

00:27:18 a million, or even a billion years to get here

00:30:15 while gravity wants to crush it inwards.

00:35:19 and some layers are sulfur

00:39:28 it's possible to compensate for the atmosphere's blurring effect.

00:42:56 or stars that get torn apart by the black hole itself.

00:47:18 With people, gray hairs and wrinkles are the telltale signs.

00:51:06 And recently astronomers made a startling discovery:

00:55:05 The more the mass, the stronger the pull.

00:58:26 The light goes right through the dark matter.

01:02:20 We've reached a mysterious period of time

01:06:19 But the process can be simulated

01:09:58 And they keep turning out to be right.

01:13:46 it's that radiation itself that changes the fog around them

01:18:09 ...and clues to the impending disaster lie in these mysterious Hubble images.

01:21:50 And the formation of these new stars

01:26:04 where water would be in liquid form

01:30:00 It's a little bit like having a searchlight

01:33:15 At the outskirts of our Milky Way galaxy