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Earth & Moon

QuestionAnswer
Astronomy The study of the moon, stars, & other objects in the exosphere.
Axis An imaginary line that passes through Earth's center & the North & South poles, about which Earth rotates.
Rotation The spinning motion of a planet about its axis.
Revolution The movement of an object around another object.
Orbit The path of an object as it revolves around another object in space.
Latitude The measurement of a place north or south of the earth's equator usually expressed in degrees
Solstice The 2 days of the year on which the noon sun is directly overhead at either 23.5 degrees South or 23.5 degrees North.
Equinox The 2 days of the year on which neither hemisphere is tilted toward or away from the sun.
Vernal equinox The day of the year that marks the beginning of spring in the Northern Hemisphere.
Autumnal equinox The day in the year that marks the beginning of fall in the Northern Hemisphere.
Phase One of the different shapes of the moon as seen from earth.
Eclipse The partial or total blocking of one object by another.
Solar eclipse The blocking of sunlight to earth that occurs when the moon is between the sun and earth.
Umbra The darkest part of the shadow.
Penumbra The part of a shadow surrounding the darkest part.
Lunar eclipse The blocking of sunlight to the moon that occurs when earth is directly between the sun and the moon.
Tide The rise and fall of the level of water in the ocean.
Gravity The attractive force between two objects; its magnitude depends on their masses and the distance between them.
Spring tide A tide with the greatest distance between low and high tides.
Neap tide A tide with the least difference between low and high tides.
Telescope A device built to study objects by making them appear closer.
Crater A round pit on the moon's surface.
Maria Dark, flat regions on the moon's surface; thought to be a sea of water on the moon.
Created by: vgodlove
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