Earth/Sun/Moon

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Orbit
the path an object follows as it moves around another path
Revolution
the motion of one object around another object
Rotation
spinning motion
axis
the line on which an object rotates
solstice
a day when Earths rotation axis is most toward or away from the Sun
equinox
A day when Earth's rotation axis is leaning along Earth's orbit neither toward or away from the Sun
Maria
large, dark, flat areas on the Moon caused by solidified lava
Phase
the portion of the Moon or planet reflecting light as seen from Earth
Waxing Phase
more of the Moon's near side is lit up at night
Waning Phase
less of the Moon's near side is lit up at night
Umbra
Central, darker part of the shadow where light is totally blocked
Penumbra
lighter part of a shadow where light is partially blocked
Solar Eclipse
Moon shadow appears on Earth's surface (Sun/Moon/Earth)
Lunar Eclipse
Moon moves into Earths shadow (Sun/Earth/Moon)
Tides
The rise and fall of the sea level
New Moon
Starts the Phases of the Moon
Full Moon
Completely lit up
Ellipse
A elongated circle, or oval shape, the shape of the planets orbit.
gravitational force
an attractive force that acts between any two objects; keeps the planets in orbit
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