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30 Cards in this Set
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- Back
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A small body orbiting a larger body.
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Satellite:
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A single revolution of an astronomical object around a larger astronomical object.
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Orbit:
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The center of the mass of a system, especially a system of astronomical objects.
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Barycenter:
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A measure of flatness of an ellipse, equal to the distance between the two foci divided by the length of the major axis.
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Eccentricity:
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The point at which a satellite orbiting an astronomical object is farthest from the center of the object being orbited.
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Apogee:
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The point in the orbit of a satellite, moon, or planet at which it comes nearest to the object it is orbiting.
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Perigee:
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A complete circle made around something, e.g. the orbit made by a planet or satellite around another body.
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Revolution:
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Spinning motion of a body on its axis.
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Rotation:
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A real or apparent oscillation in the orbit of one astronomical object as seen from the one around which it orbits, especially as seen in the Moon from Earth.
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Librations:
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A coarse-grained igneous rock composed of at least 90 percent feldspar
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Anorthosite:
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A hard, black, often glassy, volcanic rock. It was produced by the partial melting of the Earth's mantle.
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Basalt:
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A bowl-shaped hole on the surface of the Moon or a planet caused by the impact of a meteorite
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Craters
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A long narrow valley on the Moon's surface.
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Rille:
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A bright streak on the lunar surface that radiates from a crater.
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Rays
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A partial outer shadow that is lighter than the darker inner shadow umbra, e.g. the area between complete darkness and complete light in an eclipse.
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Penumbra:
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The darkest portion of the shadow cast by an astronomical object during an eclipse especially that cast on Earth during a solar eclipse.
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Umbra:
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An eclipse of the Moon caused by Earth passing between the Sun and the Moon and casting its shadow on the Moon.
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Lunar eclipse:
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An eclipse in which the Moon blocks all or part of the Sun's light from reaching the Earth's surface, because it passes directly between the Earth and the Sun
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Solar eclipse:
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Either of the two points where an orbit, e.g. that of a planet, crosses the ecliptic plane.
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Nodes:
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The partial or complete hiding from view of an astronomical object, e.g. the Sun or Moon, when another astronomical object comes between it and the observer.
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Eclipse seasons:
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Percent of light reflected from the surface.
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Albedo:
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Appearance of the moon (or a planet) when more than half (but not all) of the body’s hemisphere is visible from earth.
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Gibbous:
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The rotation against the constellations
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Sidereal:
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Two things seen from moon:
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Rotating earth & Solar eclipse
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Things to know: Sirius is the brightest star
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Things to know: Apollo 17 was the last to land on the moon
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Things to know: Our moon is solar system based
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Things to know: Our moon is the largest in a planet earth ratio
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Things to know: Neal Armstrong was first, Buzz Aldren was second, Mike Collins third (never left the orbiter)
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Things to know: Name of the first moon landed: Eagle one
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Things to know: James lovell was on Apollo 13
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Things to know: Earth facing = near side
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Things to know: Two major features of the moon’s surface / light and dark?
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Things to know: Maria (the dark new soil) and Terra (the heavily cratered light colored) oldest.
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Things to know: The period of the earth’s rotation is EQUAL to its sidereal period of its revolution.
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Things to know: No rise or setting of the earth from the moon.
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