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Bellaire SCI8 Astronomy CH1

Astronomy the study of the moon and starts and other objects in space
Rotation Earth’s spinning on its axis
Revolution the movement of one object around another object
Orbit Earth’s path as it revolves around the sun
23.5* the angle of the tilt of the Earth’s axis
Latitude is a measurement of distance from the equator, expressed in degrees north and south
Solstice two days of the of the year on which the noon sun is directly overhead at either 23.5* South or 23.5* North
June 21 the summer solstice when the noon sun is overhead at 23.5* North
Equinox equal night when the lengths of nighttime and daytime are about the same
Vernal Equinox spring equinox occurs around March 21 when the length of nighttime and daytime are equal
Autumnal equinox autumn equinox occurs September 23 when the length of nighttime and daytime are equal
Solar eclipse occurs when the moon passes between Earth and the sun, blocking the sunlight from reaching the Earth
Umbra the darkest part of the moons shadow that is cone shaped
Penumbra the part of the moon’s shadow that surrounds the darkest part
Lunar eclipse the blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon
Tides the rise and fall of water every 12.5 hour in the oceans
Gravity the pull of the moon and Earth (including the water on the Earth) towards each other
Spring tide a tide with the greatest difference between low and high tides
Neap tide a tide with the least difference between low and high tides
Satellite any natural or artificial object that revolves around an object in space; moon around Earth, Sputnik 1, Explorer 1
Geosynchronous orbits satellites that revolve around Earth at the same rate that Earth rotates; they seem to hover over a given point; TV satellites to relay signals
Telescopes a device built to study distant objects by making them appear closer
Craters round pits that cover the moon’s surface
Maria Latin word for “sea”; dark flat regions on the moon’s surface
Created by: kdewey