Astronomy Review

Front

Universe

Back

space and all of the matter and energy that exists

Front

Big Bang Theory

Back

theory that the universe originated from a single point

Front

Redshift

Back

longer wavelengths of light due to universe expanding

Front

Galaxy

Back

billions of stars, gas & dust bound together by gravity

Front

Star

Back

ball of hot gas undergoing nuclear fusion

Front

Nuclear fusion

Back

reaction that occurs in the core of a star (H → He)

Front

Luminosity

Back

brightness of a star

Front

Comet

Back

a ball of frozen dust and ice orbiting the Sun, tail glows

Front

Asteroid

Back

solid, rocky/metallic body orbiting the Sun alone

Front

Meteor

Back

a streak of light in the sky when an object burns up in the atmosphere