The fuzzy, gaseous component of a comet's head.
A cloud of gas or dust in space.
A small body made of rocky and metallic pieces held together by frozen gases.
Small, irregularly shaped body formed by colliding matter.
A small rocky body, which can range in size
A small, solid particle that travels through space.
The luminous phenomenon observed when material enters the Earth's atmosphere and burns up.
Any portion that reaches the Earth's Surface.
The Jupiter-like planets, also known as gas giants. (farthest away)
any of the Earth-like planets. (closest to the sun)