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Sun- Earth- Moon

TermDefinition
Axis An imaginary line that runs through the Earth from the North Pole to the South Pole. The Axis is tilted at a 23.5 degrees angle.
Rotation When the Earth spins or rotates on it's axis.
Penumbra The area of the shadow for a partial Solar Eclipse.
Waning The moon is called a waning moon when it is in the phase in which its visible surface area is getting smaller. A waning moon occurs between a full moon and a new moon.
Third Quarter The Moon has completed three quarters of it's orbit around the Earth.
Ellipse An oval shaped shape that is the orbit path for the Earth.
Lunar Eclipse The Moon moves into the Earth's shadow, causing the Moon to be darkened.
Equinox The time or date (twice each year) at which the sun crosses the equator, when day and night are of approximately equal length
New Moon When the Moon is completely dark(No Sun reflecting off of it)
Gibbous Part of the Moon that is greater than a semicircle and less than a circle.
Orbit The curved path of an object around a star, planet, or moon.
Solar Eclipse An eclipse in which the Sun's light is blocked by the moon.
Solstice The time or date (twice each year) at which the sun reaches its maximum or minimum time, marked by the longest and shortest days
Full Moon Full moon occurs when the Moon is on the opposite side of Earth from the Sun, and thus the side of the Moon that is illuminated faces Earth.
Tides The alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
Revolution The Earth goes around the Sun on its ellipse path.
Umbra The fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
Waxing A waxing moon is any phase of the moon during the lunar cycle between the new moon and the full moon. A moon that is waxing is one that is getting larger each night.
First Quarter The Moon has completed one quarters of it's orbit around the Earth.
Created by: user-1828728
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