Galaxy Explained in 60 Seconds #Shorts

A galaxy is a vast island of billions of stars, gas, and dust held together by gravity, with a supermassive black hole at its core. The Milky Way spans 100,000 light-years and contains around 200 billion stars — and is just one of trillions in the observable universe.

Subject: Astrophysics

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1. A galaxy is a vast island of stars, gas, and dust, held together by gravity. We
2. At its heart sits a bright bulge of older stars, glowing yellow and orange in the densest region of the galaxy.
3. Reaching outward from the bulge are graceful spiral arms, traced out by waves of new star formation in bright blue.
4. This galaxy spans an incredible 100,000 light-years from edge to edge — light itself takes a thousand centuries to cross it.
5. Threading between the spiral arms are dark dust lanes, where new stars and planets are being born inside cold molecular clouds.
6. And at the very center, hidden until now, lurks a supermassive black hole — millions of times the mass of our Sun.
7. The entire galaxy is rotating, but it
8. Zoom out, and our galaxy becomes just one tiny speck among trillions in the observable universe.
9. Each one of those points is another galaxy, each containing billions of stars, planets, and possibly other observers wondering the same things we do.

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Видео Galaxy Explained in 60 Seconds #Shorts канала Unseel Astronomy