earth in the universe
Post on 23-Feb-2016
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EARTH IN THE UNIVERSE
Orbit To orbit is to move around something
in a circle.
Axis real or imaginary line on which
something rotates.
Rotation The act or process of turning around
a center or an axis. A complete cycle of circular motion.
Moon Earth’s natural satellite that orbits
the Earth approximately every 28 days, and is visible because it reflects sunlight.
Cycle Repeating sequence.
Revolve To turn around a center point.
Appearance
Act of coming in to view.
Phase Angle that a viewer from earth can
see the moon.
New Moon The moon is between the sun and
earth, so the side facing earth is not illuminated. (The moon is not seen)
First Quarter The right half of the moon is
illuminated.
Full Moon The entire side of the moon facing
the Earth is illuminated.
Last/Third Quarter The left half of the moon is
illuminated.
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