A cluster of stars.
A cluster of stars held together by GRAVITY.
A system of millions or billions of stars, together with gas and dust, held togehter by GRAVITY.
A few stars.
Comets can form when breaking off from asteroids.
Meteorites pass through Earth's atmosphere.
Meteors pass through Earth's atmosphere.
Asteroids can be seen from the Earth.
Comets are made of ice, dust, rock, and metal.
Meteors can sometimes have ice in them.
We can see meteoroids pass through our atmosphere.
The Earth is 1 AU away from the sun.