Comets
Comets are lumps of ice and dust that periodically come into the center of the solar system. When comets come close to the sun, they evaporate and jets of gas and dust form tails that we can see from Earth (tails can be millions of miles long). A notable comet is Halley’s Comet, which is named after Edmund G. Halley, who was first to suggest that things other than planets orbit around the sun
Halley's Comet appears every 76 years. It was observed by Giotto telescope
Another comet is Shoemaker- Levy 9. It was the 9th comet to be discovered by The Shoemaker/ Levy trio. It broke apart in 1992 and plunged into Jupiter in 1994
Asteroids
Asteroids are pieces of rock that orbit other objects such as the sun. Main Asteroid Belt is a ring of asteroids that orbit between Mars and Jupiter. It is 2.5 times closer to the earth than sun.
It contains billions to trillions of asteroids ranging in size.
It was created because of the asteroids' inability to form into a planet because of Jupiter’s gravity.
The Main Asteroid Belt originally had enough rock pieces to form a planet almost 4x as big as Earth, whereas now it would form into one that wouldn’t even be half as big as the moon.