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point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars apex , apex of the sun's way , solar apex
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun aphelion
unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) Astronomical Unit , AU
study of the solar system astronomy
outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse aureole , corona
Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543) Copernicus , Mikolaj Kopernik , Nicolaus Copernicus
time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day day , sidereal day
any region in space outside the solar system deep space
(astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions ephemeris time , TDT , terrestrial dynamical time , terrestrial time , TT
slight depression in the midline just below the sternum (where a blow can affect the solar plexus) epigastric fossa , pit of the stomach
any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter) gas giant , Jovian planet
United States astronomer (born in the Netherlands) who studied the solar system and suggested in 1951 that there is a belt of comet-like debris at the edge of the solar system (1905-1973) Gerard Kuiper , Gerard Peter Kuiper , Kuiper
warming effect caused by solar radiation greenhouse effect
atmosphere, absorption of solar radiation heating the earth's greenhouse effect
earth's atmosphere trapping solar radiation greenhouse effect
heating of earth's atmosphere by solar radiation greenhouse effect
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