Translation of "Asteroid" in Chinese

The asteroid broke up into small pieces as it entered Earth's atmosphere.

进入地球大气层后，小行星分裂成了无数的小块。

- Don't confuse comets and asteroids.
- Don't mix up comets and asteroids.
- Don't confuse a comet with an asteroid.

不要把流星和小行星搞混了。