We live in a galaxy, the Milky Way Galaxy.

Our own Milky Way Galaxy is rich in this kind of planets.

There are about a hundred billion stars in the Milky Way Galaxy.

We are residents of one small planet in a corner of the Milky Way galaxy.

We think that there are about 10 million dead stars in the Milky Way alone, our galaxy.

And here's a beautiful picture of the Andromeda Nebula, which is our closest, largest spiral galaxy to the Milky Way.

So, we can even put a number to how many of those planets now do we expect our own Milky Way Galaxy harbors.

We would see a shadow of that black hole against the hundred billion stars in the Milky Way Galaxy and its luminous dust lanes.

In June 1994, two scientists using the HST discovered disks of protoplanetary dust around stars in the Orion Nebula region of the Milky Way galaxy.

Every one of these little blobs is a galaxy roughly the size of our Milky Way a hundred billion stars in each of those blobs.

Scientists believe, for example, that the interactions of cosmic ray particles with gas between the stars produce diffuse gamma ray emissions from our Milky Way galaxy.

In fact, the head of Harvard's observatory back then gave a great debate in which he argued that the Milky Way Galaxy was the entire universe.

We see black holes at the heart of our galaxy, in the Milky Way, and elsewhere in the universe, where time itself seems to stand still.

These huge explosions come from all directions, suggesting a cosmological cause until this discovery it was believed that the bursts were limited to within the Milky Way galaxy.

If we're going to look for these stealth black holes at the center of galaxies, the best place to look is in our own galaxy, our Milky Way.

Whether we're born in San Francisco, or Sudan, or close to the heart of the Milky Way galaxy, we are the products of a billion year lineage of wandering stardust.

There's the galaxy in the middle, which is the Milky Way, and around that are the Hubble you know, nearby kind of galaxies, and there's a sphere that marks the different times.

Night shots are beautiful, piercing the Big Dipper and the Milky Way.

The solar system is a small celestial system in the Milky Way.

In his essay Dreams and Facts, the philosopher Bertrand Russell wrote that our entire Milky Way galaxy is a tiny fragment of the universe, and within this fragment our solar system is an infinitesimal speck, and within this speck our planet is a microscopic dot.

If we want humanity to last forever, we have to colonize the Milky Way.

And this is a wide field picture taken of the center of the Milky Way.

For centuries, astronomers believed that the Milky Way made up the entire universe. Hubble was among the first to show that the fuzzy patches in the sky seen through telescopes were other galaxies, not distant parts of the Milky Way.

And if one were to eclipse the Milky Way, this is what it would look like.

Then he says to himself, very quietly, Turbulent the sea, Stretching across to Sado The Milky Way .

Even if you imagine that this room we are in now exists and is real and here we are, and we have, not only our memories, but our impression that outside there's something called Caltech and the United States and the Milky Way Galaxy, it's much easier for all those impressions to randomly fluctuate into your brain than for them actually to randomly fluctuate into Caltech, the United States and the galaxy.

All of the ones we've found, by the way, are in this little, teeny, tiny corner where we live, in the Milky Way. There must be millions of planets in the Milky Way, and as Carl Sagan insisted for many years, and was laughed at for it, there must be billions and billions in the universe.

We say, the ray of light came this way the galaxy must be there, OK.

A galaxy. Hey, there's another galaxy.

Arno Penzias and Robert Wilson were using the horn antenna at Bell's Holmdel laboratory to study the Milky Way with extraordinary precision.

This revelation indicates that the formation of planets may be relatively common both in the Milky Way and in other parts of the universe.

Most of you like milky, weak coffee.

And then beyond Salcantay, of course, when the southern cross reaches the southernmost point in the sky, directly in that same alignment, the Milky Way overhead.

Chris Anderson Professor, if you had to guess either way, do you now believe that it is more likely than not that we are alone in the Milky Way, as a civilization of our level of intelligence or higher?

Oh look, there's another galaxy.

Arrangements for the Galaxy System

And every time there's a galaxy at its location there's a galaxy and if we know anything about the galaxy, which we do, because there's a redshift measurement and everything, you put in the type of galaxy and the color, so this is the real representation.

In fact, this galaxy and every other galaxy appears to be embedded in a cloud of this invisible dark matter.

How do we see that galaxy?

This has contributed to determining the correlation length of X ray emitting clusters of galaxies, the distribution of galaxies in the southern hemisphere and the mapping of large scale structures behind the Milky Way.

And the edge of our galaxy is 75,000 light years away, and the nearest galaxy to us, 2.5 million light years.

Now, the advantage of studying our own galaxy is it's simply the closest example of the center of a galaxy that we're ever going to have, because the next closest galaxy is 100 times further away.

This is the picture of a galaxy, a common our garden galaxy with, what, 100 billion stars like our Sun in it.

It's part of that galaxy, and it's shining as brightly as the center of the galaxy with a billion suns in it.

Where will this observer see the galaxy?