Unit 2 Astronomy Vocab

Front

Brightness of a star

Back

Magnitude

Front

Average distance from Earth to Sun

Back

Astronomical Unit (AU)

Front

Moon casts shadow on Earth

Back

Solar Eclipse

Front

Earth's shadow on the Moon

Back

Lunar Eclipse

Front

Light source moving away stretches light waves, changing color.

Back

Redshift

Front

Energy source at a star's center where smaller atoms merge into a larger one.

Back

Fusion

Front

A large collection of stars and planetary systems, like our Milky Way.

Back

Galaxy

Front

All galaxies, stars, matter, and energy that exist

Back

Universe

Front

Collection of dust and debris that becomes a star

Back

Nebula

Front

Rocky material orbiting a star too small to be a planet

Back

Asteroid