百灵鸟
发表于 2025-4-1 05:42:15
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CLOWN
发表于 2025-4-1 08:08:56
Planetary Surface Temperatures,urface, which then radiates infrared radiation. The temperatures of the planets are much lower than those of the Sun because of the enormous energy output of the Sun’s nuclear furnace. It may surprise you to learn, however, that the planets have their own internal sources of heat, although these sou
HACK
发表于 2025-4-1 11:45:47
The Vault of Heaven,mber on which the stars were emblazoned and within which the Sun, Moon, and planets moved. But not all ancient observers agreed on that perception. The shape of the sky is a subjective notion, conditioned by cultural, psychological, and physiological factors. It has sometimes been depicted as a flat