Meteor

A small rocky or metallic body in outer space.

Meteorite

It is when a meteor hits the earth's surface. That meteor is now called a meteorite.

Elliptical Orbit

When an object moves around another object in an oval shaped path, it is known to be revolving in an elliptical orbit.

Comets

It is a fuzzy, luminous big dirty snowball composed of rock dust wrapped around a big ball of ice.

Meteors

In plural term.

Asteroids

They are rocky worlds revolving around the sun that are too small to be called planets. They are also known as planetoids or minor planets.