Discover the Night Sky Vocab Flashcard

Front

Central shadowed area behind an object

Back

Umbra

Front

Degree of angle above horizon

Back

Altitude

Front

Description of decreasing light reflected by the moon from full to new moon.

Back

waning

Front

Measure of gravity on an object's mass

Back

weight

Front

Two points on the ecliptic where the sun is farthest from the celestial equator.

Back

Solstice

Front

Portion of a shadow where part of the light source is blocked.

Back

penumbra

Front

Interstellar gas, dust, and young stars winding outward in a plane from a galaxy's center.

Back

Spiral Arm

Front

Altitude point directly above the observer

Back

Zenith

Front

Slow conical motion of Earth's axis due to moon and sun's gravity.

Back

precession

Front

Plane separating earth from sky.

Back

Horizion