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Easy Win
Astronomy: Stars, Galaxies, and Black Holes (Intro)
Easy Win
Astronomy: Stars, Galaxies, and Black Holes (Intro)
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💡 Key Takeaways
- Learn what stars, galaxies, and black holes are and how they fit in the universe.
- Find out how stars are born, shine for billions of years, and die in different ways.
- Discover what a galaxy is and that galaxies come in shapes like spirals.
- Understand that black holes have gravity so strong that light cannot escape.
❓ Frequently Asked Questions
What is a star?
A hot ball of gas that shines because nuclear fusion fuses hydrogen into helium in its core. The Sun is a star.
What is a galaxy?
A huge collection of stars, gas, and dust held together by gravity. Our Milky Way is a galaxy with billions of stars.
What is a black hole?
A region of space where gravity is so strong that nothing, not even light, can escape. They form when massive stars collapse.
What is a light-year?
A distance—how far light travels in one year (about 5.9 trillion miles or 9.5 trillion kilometers).