Outside Solar System Vocabulary

Any planet that exist outside our Solar System 

A galaxy without a regular shape

A large collection of planets, gas, dust, and billions of stars, bound together by gravity

A planetary system 

A unit of distance in astronomy equal to the distance that light travels in one year 

A celestial body in orbit around a star

Brightness 

An oval-shaped galaxy 

A group of stars that forms a shape and is named for that shape 

To revolve around another object 

A star and the celestial bodies that revolve around it; a planetary system 

Anything that takes up space and has weight 

A theory that suggest the universe began from a single, enormous explosion & is still expanding

A measure of the amount of radiating or reflected light coming off a star or other object

The stage of change that something goes through as time passes

The whole Universe

Who is someone that is trained to travel and perform tasks in space?

An oval-shaped galaxay

The force that draws objects toward the center of the earth or any other large celestial body

A close group of similar objects

A unit of distance in astronomy that light travels in one year

A region of space with a gravitational field so intense that nothing can escape it

A scientist who studies planets, stars, galaxies and other objects in space is a what?

The galaxy that includes the Sun and our Solar System

Any planet that exist outside our Solar System 

The measure of the amount of the matter on an object 

A region or cloud of interstellar dust and gas appearing as a bright or dark patch 

A scientist who studies the origin and structure of the universe 

The open areas between solid bodies in the universe beyond our Solar System