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The Moon
Term | Definition |
---|---|
moon phases | the different forms that the Moon takes in its appearance from Earth |
new moon | occurs when the Moon is between the Earth and the Sun. The Moon is in the sky but cannot be seen |
waxing | the more illuminated half of the Moon can be seen at night |
full moon | occurs when all of the Moon's surface facing Earth reflects light |
waning | you see less of the Moon's illuminated half can be seen at night |
solar eclipse | occurs when the Moon moves directly between the Sun and Earth and casts its shadow over part of Earth |
umbra | the darkest portion of the Moon's shadow |
penumbra | the lighter portion of the Moon's shadow |
lunar eclipse | when Earth's shadow falls on the Moon |
maria | dark, flat regions on the Moon |