Moon and Eclipses

Front

maria

Back

the large, dark, flat areas on the Moon.

Front

phase

Back

the lit part of the Moon or a planet that can be seen from Earth.

Front

waxing phases

Back

phases of the Moon during which more of the Moon’s near side is lit each night.

Front

waning phases

Back

phases of the Moon during which less of the Moon’s near side is lit each night.

Front

umbra

Back

the central, darker part of a shadow where light is totally blocked.

Front

penumbra

Back

the lighter part of a shadow where light is partially blocked.

Front

solar eclipse

Back

an occurrence during which the Moon's shadow appears on Earth's surface.

Front

lunar eclipse

Back

an occurrence during which the Moon moves into Earth's shadow.