Space 太空

10 facts about space:

1. Vastness: Space is incredibly vast. The closest star to Earth, Proxima Centauri, is about 4.24 light-years away.

2. Planets: Our solar system has eight planets, including Earth. They all orbit around the Sun.

3. Stars: Stars are massive, glowing balls of hot gas. The Sun is the closest star to us.

4. Galaxies: A galaxy is a huge collection of stars, gas, and dust. The Milky Way is our galaxy.

5. Black Holes: These are regions in space where gravity is so strong that nothing, not even light, can escape.

6. Nebulae: These are large clouds of gas and dust where new stars are born.

7. Weightlessness: In space, there's very little gravity, so astronauts float around in their spacecraft.

8. Dark Matter: Most of the universe is made up of dark matter, a mysterious substance that we can't see.

9. Light Speed: Light travels at a speed of about 299,792 kilometers per second (186,282 miles per second).

10. Universe Age: The universe is around 13.8 billion years old.

Anything specific you'd like to know more about?