Grandstand 发表于 2025-3-28 15:24:54
Our Three Wacky Inner Planets: Imaginary, Delusionary and Inhabited,y three decades from the 1850s, when the answer would have been Vulcan, Mercury and Venus. We are familiar now with Planet Vulcan being the home of Mr. Spock of Star Trek fame, but that fictional planet was in orbit around a star named 40 Eridani A, a star 16.5 light years (a mere 98,000,000,000,000妨碍 发表于 2025-3-28 19:29:05
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Earth: Flat, Hollow or Inside Out?,minor planets and comets. Current evidence on the inner space of our planet indicates that its center is a solid ball of iron-nickel alloy with traces of other metals. The pressure at Earth’s core is about 22,000 tons per square inch and the temperature is about 10,000°F. Normally iron would boil atOintment 发表于 2025-3-29 08:39:20
Our Moon: Inhabited, Small and Icy,ext relatively largest moons are Titan, only 0.024% of Saturn’s mass, and Triton, at 0.022% of the mass of Neptune. Among these contestants, our Moon stands out as relatively enormous compared with Earth, and yet its physical size is quite normal compared to the actual size of other large moons in o轮流 发表于 2025-3-29 11:37:39
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http://reply.papertrans.cn/103/10202/1020135/1020135_48.pngIDEAS 发表于 2025-3-30 03:26:04
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