Solar system pt2

Orbit

The path that a body follows a it travels around another body in space

Momentum

A measure of how hard it is to stop a moving object

Period of Rotation

The time it takes an object to complete on rotation

Satellite

A moon, planet , or machine that orbits a planet or star

Solar Nebula

The sun, all the planets, all of the smaller bodies in the solar system - including moons, asteroids, and meteors- formed from a swirling cloud of gas and dust

Period of Revolution

The time it takes an object to travel once around the sun

Elliptical orbit

An oval shaped path like a slightly elongated circle

Gravity

A force of attraction between objects that is due to their masses

Greenhouse Effect

The natural process that occurs when certain gases in the atmosphere absorb and radiate thermal energy from the sun.

Extremophile

An organism that lives under extreme environmental conditions

Ozone

A gas molecule that is made up of three oxygen atoms

Atmosphere

A mixture of gases that surrounds a planet, moon, or other celestial body

Ultraviolet

Electromagnetic wave frequencies immediately above the visible range.

Habitable Zone

The area around a star where it is not too hot and not too cold for liquid water to exist on the surface of surrounding planets