太空是一个充满神秘和未知的地方，我们需要掌握一些有关太空的英文单词来更好地了解它。以下是一些关于太空的英文单词及其例句：

1. Universe (宇宙) - The universe is vast and contains billions of galaxies.

2. Galaxy (星系) - The Milky Way is one of the many galaxies in the universe.

3. Planet (行星) - Earth is the third planet from the sun.

4. Star (恒星) - The sun is a star that provides light and heat to the Earth.

5. Moon (月球) - The moon orbits around the Earth and causes tides.

6. Asteroid (小行星) - Asteroids are small, rocky objects that orbit the sun.

7. Comet (彗星) - A comet is a celestial object that produces a tail of gas and dust.

8. Meteor (流星) - A meteor is a bright streak of light that is produced when a meteoroid enters the Earth's atmosphere.

9. Satellite (卫星) - Satellites are objects that orbit around a planet or other celestial body.

10. Spacecraft (宇宙飞船) - The International Space Station is a spacecraft that orbits the Earth.

以上这些单词是我们在了解太空时会经常遇到的，掌握它们可以帮助我们更好地理解和探索太空。