Heirarchical Relationships/Galaxy Vocab

Front

Astronomical Unit

Back

Distance between Sun and Earth

Front

Asteroid

Back

small, rocky bodies between Mars and Jupiter

Front

Comets

Back

loose balls of ice and dust

Front

Moon

Back

Natural Satellite

Front

Planet

Back

round, orbits the sun, and has cleared its region in the solar system.

Front

Universe

Back

all of space and everything in it

Front

Galaxy

Back

huge group of stars, gas, dust held by gravity

Front

Light Year

Back

distance light travels in one year

Front

Moon

Back

natural satellite that orbits a planet

Front

Meteoroid

Back

smaller chunks of dust and rock that may enter Earth's atmosphere.