BJU - Space and Earth Science - Chapter 7
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| The Uniformitarian theory that all celestial objects, but especially those of the solar system, were formed by the gravitational accumulation of space dust. | accretion theory
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| The point in the orbit of the moon or a man made satellite where it is farthest from Earth. | apogee
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| Bright pinpoints of light that appear briefly during a total solar eclipse as sunlight shines through valleys around the moon's edge. | Baily's beads
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| The naturalist theory that the moon was once a planet in its own orbit around sun but that the earth somehow deflected it into an orbit around the earth. | capture theory
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| A pointed end of a crescent moon. | cusp
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| During a total solar eclipse, the effect produced by a single Baily's bead flash occurring along the thin remaining solar crescent at the limb of the moon. It occurs immediately before or after totality in a solar eclipse. | diamond ring effect
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| Sunlight reflected from the dark side of the moon that was originally reflected from the earth. | earthshine
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| The initial speed an object must have in order to free itself from the gravitational pull of a planet or other celestial body. | escape velocity
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| The phase of the moon when the western half of the moon is lighted and the eastern half is dark. | first quarter
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| A naturalistic theory of the origin of the moon suggesting that somehow the moon split away from the earth when the earth was still molten. | fission theory
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| A push or a pull exerted on an object. A force may be transmitted by contact between two objects (e.g. an impact) or exerted over a distance between objects (e.g. gravity). | force
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| The lunar phase in which the moon's entire near side is lighted. | full moon
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| The full moon nearest the autumnal equinox (about September 22 in the Northern Hemisphere). | harvest moon
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| The next full moon after the harvest moon. | hunter's moon
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| A naturalistic moon origin theory that suggests that matter in the moon was once a part of the earth, but a collision with another celestial object ejected matter from earth, which coalesced and went into orbit around the earth as the moon. | impact theory
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| Same as third quarter. It is that phase of the moon in which the eastern half is lighted and the western half is dark. | last quarter
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| The darkening of the full moon when it passes into the earth's shadow. | lunar eclipse
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| A dark, flat lowland region on the moon's surface. | mare
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| A measure of the amount of matter an object contains; not dependent on the force of gravity. | mass
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| That phase of the moon when it is positioned in its orbit between the sun and the earth and is not visible because of the sun's glare. | new moon
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| An eclipse in which the face of the sun is never fully covered, as observed at a particular location. | partial eclipse
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| The point nearest the earth in the orbit of the moon or of an earth-orbiting satellite. | perigee
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| Any of the bright streaks on the moon's surface radiating from some of the moon's craters. | ray
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| Long, narrow, snaking valleys especially evident on the moon's surface. | rill
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| An eclipse that occurs when the moon passes between the earth and the sun, blocking some or all of the sun's light to the earth at a given location. | solar eclipse
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| The line dividing the lighted portion of a nonluminous celestial body from the dark portion. | terminator
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| Same as last quarter. It is that phase of the moon in which the eastern half is lighted and the western half is dark. | third quarter
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| An event where the direct (solar) or reflected (lunar) light from the sun as viewed by an observer at a given location is completely cut off by another astronomical body. | total eclipse
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| The decreasing phase of the moon during the last week of the lunar cycle. | waning crescent
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| The decreasing phase of the moon, following a full moon, when the illuminated disk gradually diminishes to the third quarter. | waning gibbous
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| The increasing phase of the moon, during the week following anew moon, when its illuminated portion appears as a thin, gradually thickening crescent. | waxing crescent
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| The increasing phase of the moon, during the second week following the first quarter, when the illuminated portion is gradually enlarging toward a full moon. | waxing gibbous
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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