00:00This is Earth.
00:05This is where you live.
00:07And this is where you live in your neighborhood.
00:10The solar system.
00:16Here's the distance between the Earth and the Moon.
00:20Doesn't look too far, does it?
00:22Think again.
00:23At their farthest point, the Earth and the Moon are 252,088 miles away.
00:29Inside that distance, you can fit every planet in our entire solar system.
00:34But let's talk about planets.
00:36The great red spot on Jupiter, that's about two times as big as Earth.
00:40And Saturn is about nine times wider than Earth.
00:43Saturn's rings are so large that a few of the fragments within them are as large as mountains.
00:49But that's nothing compared to our Sun.
00:52Just remember, this is Earth.
00:55And this is Earth from the Moon.
00:58This is Earth from Mars.
01:00Here's Earth from just behind Saturn's rings.
01:03And here's Earth from just beyond Neptune, four billion miles away.
01:08But a billion's a big number.
01:10So let's put that in perspective.
01:12One million seconds equals about 11 and a half days.
01:15Whereas one billion seconds equals over 31 years.
01:19Let's step back a bit.
01:22Here's the size of Earth compared with the size of our Sun.
01:25Terrifying, right?
01:28And here's that exact same Sun from the surface of Mars.
01:34As Carl Sagan once mused.
01:37The total number of stars in the universe is larger than all the grains of sand on all the beaches of the planet Earth.
01:44And there are some stars out there that are much, much bigger than our little wimpy Sun.
01:49The biggest star we know of, V.Y. Canis Majoris, is about 2,000 times the diameter of our Sun.
01:59But none of those compares to the size of a galaxy.
02:02In fact, if you shrink the size of our solar system down to the size of a quarter.
02:09And shrink the Milky Way galaxy down using the same scale.
02:12The diameter of the Milky Way will be roughly the size of the United States.
02:21That's because the Milky Way galaxy is huge.
02:27Its diameter is about 100,000 light years wide.
02:30Which, when converted to miles, is about 621,371,192,237,333,890 miles.
02:44Inside of all of that, is you.
02:48You live in this tiny, tiny portion of the Milky Way.
02:53But even still, our galaxy is a little runt compared with some others.
02:59NGC 6744, a spiral galaxy similar to our own, is twice as wide as the Milky Way.
03:06Stretching over 200,000 light years across.
03:09It is massive.
03:12But let's think bigger.
03:14In this picture alone, taken by the Hubble telescope,
03:17there are thousands and thousands of galaxies,
03:20each containing millions or billions of stars with their own planets.
03:24Some of the objects seen here may have formed as many as 11 billion years ago.
03:31Just 3 billion years after the Big Bang.
03:33This period of time is considered one of the busiest star-forming periods.
03:48And just keep this in mind.
03:54That's a picture of a very small, small part of the universe.
04:01So if you're ever feeling upset about your favorite show being canceled,
04:04or the fact that they play Christmas music way too early,
04:07just remember, this is your home.
04:10Earth.
04:14So I'm sorry.
04:17We'll see absolutely everything next time,
04:19and I'll dance on myself.
04:20I'm fine.
04:21I'm fine.
04:22Just to please play Christmas here.
04:24You've got aạnh peek at Christmas.
04:26And a little bit too,
04:29because it so does look honestly icy out for your name too little,
04:30It's a natural not easiest way,
04:39and you hope there'swerk LEGO quality yok Sin,
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