comets are formed from ice and gases
Comets and meteors were formed, along with the rest of the solar system, about four and a half billion years ago.
Nobody let them in. They formed with the solar system.
Most craters are formed by the impacts of asteroids and comets. Some craters on volcanically active bodies are volcanic in origin.
Because they are formed of ice. Space is cold, so everything is frozen.
The craters on the moon were formed by the impacts of asteroids and comets.
Comets and meteors were formed, along with the rest of the solar system, about four and a half billion years ago.
Metoroids are formed when astoroids collide or comets break up.
Saturn's rings where formed by the comets and asteroids with the strong gravitation pull .
The depressions on the moon are impact craters formed by collisions with asteroids and comets.
The other planets, stars, galaxies, meteors, comets, and asteroids.
Craters are formed when asteroids and comets collide with the lunar surface.
Nobody let them in. They formed with the solar system.
The dust that remained after the sun formed coalesced to form planets, asteroids, and comets.
Most craters are formed by the impacts of asteroids and comets. Some craters on volcanically active bodies are volcanic in origin.
Comets containing ice hit the earth, the ice melted and contributed to our oceans. Scientists don't know what percentage of our ocean came from comets.
Because they are formed of ice. Space is cold, so everything is frozen.
The craters on the moon were formed by the impacts of asteroids and comets.