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Galaxy in sentence

301 examples of Galaxy in a sentence

Remember if we want to see the black hole in the center of our galaxy, we need to build this impossibly large Earth-sized telescope?
So here I show a sample reconstruction done using simulated data, when we pretend to point our telescopes to the black hole in the center of our galaxy.
In other words, we want to leave the option open for there being a giant elephant at the center of our galaxy.
So in our simulations, we pretend a black hole looks like astronomical non-black hole objects, as well as everyday images like the elephant in the center of our galaxy.
And all of these stars are part of our local galaxy, the Milky Way.
Now, if you were to go to a darker part of the sky, a nice dark site, perhaps in the desert, you might see the center of our Milky Way galaxy spread out before you, hundreds of billions of stars.
You saw the south's celestial pole, the galaxy rising.
So for instance, if you look along the plane of the galaxy, it's alight with synchrotron, which is mostly reddish orange, but if we look very closely, we see little blue dots.
And these can tell us about these star-forming regions in our galaxy.
We look at the galaxy, and the color tells us that they're there.
Well, as it happens, we can see a very interesting object in the top right, and this is a local radio galaxy, Centaurus A. If we zoom in on this, we can see that there are two huge plumes going out into space.
And if you look right in the center between those two plumes, you'll see a galaxy just like our own.
It's a normal galaxy.
If we looked in the visible, we wouldn't even know they were there, and they're thousands of times larger than the host galaxy.
At the center of every galaxy that we know about is a supermassive black hole.
Well, very well, so we've seen one radio galaxy.
But if you just look at the top of that image, you'll see another radio galaxy.
Every single one of the dots in this image is a distant galaxy, millions to billions of light-years away with a supermassive black hole at its center pushing material into space at nearly the speed of light.
I've explored the furthest reaches of the galaxy with this survey, but there's something even more in this image.
About once every century, a massive star somewhere in our galaxy runs out of fuel.
The star shoots most of its innards into space, seeding the galaxy with heavy elements.
When I first saw it, it reminded me of a galaxy.
We'll be able to see explosions of supernovas in our galaxy.
In these galaxies, especially in a spiral galaxy like this, most of the mass of the stars is concentrated in the middle of the galaxy.
This huge mass of all these stars keeps stars in circular orbits in the galaxy.
In fact, this galaxy and every other galaxy appears to be embedded in a cloud of this invisible dark matter.
And this cloud of matter is much more spherical than the galaxy themselves, and it extends over a much wider range than the galaxy.
So we see the galaxy and fixate on that, but it's actually a cloud of dark matter that's dominating the structure and the dynamics of this galaxy.
And suppose there's a galaxy out here in the universe.
How do we see that galaxy?
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