Solar System

The death explosion of a massive star, resulting in a sharp increase in brightness.

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

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

A close group of similar objects

A scientist who studies planets, starts, galaxies, and other objects in space.

A measure of the amount of light coming off a star; brightness

A scientist who studies the origin and structure of the universe.

An instrument used to make distant objects look closer

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

Any planet that exists outside the solar system.

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

The open areas between solid bodies in the universe beyond the solar system

A body in outer space, made of hot gasses, that shines in the night sky.

To revolve around another object.

A theory that suggests that the universe began from a single enormous explosion.