8 Astronomy Ch. 1 Vocab

Front

Astronomy

Back

Study of the moon, stars, and other space objects.

Front

Axis:

Back

An imaginary line through Earth's center and the North and South poles about which Earth rotates.

Front

calendar

Back

a system for organizing time defining the year's start, length, and divisions.

Front

Craters

Back

A large round pit caused by the impact of a meteoroid.

Front

Eclipse

Back

Partial or total blocking of one object in space by another.

Front

Equinox

Back

The two days of the year when neither hemisphere is tilted towards or away from the sun.

Front

Force:

Back

A push or pull exerted on an object.

Front

Gravity

Back

Attractive force between objects; strength depends on their masses and distance.

Front

Inertia

Back

The tendency of an object to resist a change in motion.

Front

Law of Universal Gravitation

Back

Every object in the universe attracts every other object.