Astronomy 1 Flashcards Study Guide

Front

The force that holds moons around planets, planets around the sun, and stars in a galaxy

Back

Gravity

Front

The most massive planet

Back

Jupiter

Front

The least massive planet

Back

Mercury

Front

Earth's twin

Back

Venus

Front

How gravity changes as distance between objects in space increases

Back

Gravity decreases

Front

Order from largest to smallest: asteroids, comets, meteors, meteoroids, meteorites, planets, moons

Back

1. Planets 2. Moons 3. Comets 4. Asteroids 5. Meteors, Meteoroids, Meteorites

Front

When the tail of a comet appears and its direction

Back

Appears when near the sun; points away from the sun

Front

Another name for meteors

Back

Shooting stars

Front

Asteroid Belt location

Back

Between Mars and Jupiter

Front

Three parts of a comet

Back

Nucleus, Coma, Tail