NEED NOW ALMOST DUE Asteroids are objects made of and that orbit the sun but are too small to be considered planets.

Most asteroids revolve around the sun in an orbit between those of and .

They form a wide band called the Asteroid .
Other asteroids have orbits that cross Earth’s orbit. These asteroids are called .

Asteroids probably consist of matter that never agglomerated into a when the solar system was forming.

Comets Video:

The comet’s core is composed of and .

Comets heat up and begin to as they approach the sun.

The matter surrounding a comet’s core is vaporized and forms a very bright halo of , and an enormous cloud of envelopes the head of the comet.