Earth-Sun-Moon System
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11 Terms
axis
an imaginary line around which a rotating object turns
celestial object
a natural object in space
orbit
the path that an object follows as it revolves around another object
revolution
the motion of an object around another object in space
rotation
the spin of an object around a point or line
equinox
a time of year when the sun is directly overhead at the equator at noon, when day and night are of equal length
solstice
a time of year when the sun is directly overhead at one of the tropics during noon
lunar phase
the appearance of the lit area of the moon as seen from Earth
eclipse
an event in which the shadow of one celestial object falls on another celestial object
lunar eclipse
an eclipse that happens when the moon passes through Earth’s shadow
solar eclipse
an eclipse that happens when light from the sun is blocked by the moon, and the moon’s shadow falls on Earth