Earth’s solar system and the celestial bodies:
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Standard time, civil time used within a given time zone. The earth is divided into 24 time zones, each of which is about 15° of longitude w...
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Comet, a small celestial body consisting mostly of dust and gases that moves in an elongated elliptical or nearly parabolic orbit around the...
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Eclipse, in astronomy, the obscuring of one celestial body by another, particularly that of the sun or a planetary satellite. Two kinds of e...