Space Systems

Front

a chunk of ice, dust, and rock material a few kilometers in size

Back

comet

Front

an extremely dense object that can form after a star goes supernova

Back

black hole

Front

an explosion that ends a star’s life

Back

supernova

Front

an object that orbits the Sun but doesn’t clear away all objects near its orbit

Back

dwarf planet

Front

an object orbiting a larger object

Back

satellite

Front

a small, rocky object that orbits the Sun

Back

asteroid

Front

an enormous collection of tens of millions to hundreds of billions of stars, gas, and dust

Back

galaxy

Front

the distance light travels in 1 year

Back

light-year

Front

a theory that one explosion created the universe

Back

big bang theory

Front

the name of the galaxy the Sun is a part of

Back

Milky Way