Tractable 发表于 2025-3-30 10:47:43

The Twilight Zone of the Solar System,ar System consisted of just these five planets plus the Earth, the Sun and the Moon. Then, in 1781, the academic world received a rude shock when an amateur astronomer discovered another planet with his home-made reflecting telescope!

表示向下 发表于 2025-3-30 12:23:26

The Comets,mets used to be regarded as the portents of doom and tragedy and many a bright comet has caused widespread panic. For instance, a bright comet caused alarm in the England of 1665, in the early weeks of the Great Plague. Another appeared in 1666 just before the Great Fire that was to purge the plague

冬眠 发表于 2025-3-30 17:39:15

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割公牛膨胀 发表于 2025-3-30 22:08:01

The Stars,antee that you will find the scene both majestic and beautiful. I still do, even though I have been skywatching for several decades. I know that countless people have had similar experiences right back through the ages to the dawn of mankind and so it is of little wonder that astronomy is the oldest

integrated 发表于 2025-3-31 03:57:47

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absolve 发表于 2025-3-31 08:55:25

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完全 发表于 2025-3-31 13:14:09

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查看完整版本: Titlebook: Astronomy in Depth; Gerald North Book 2003 Springer-Verlag London 2003 astronomy.black hole.cosmology.earth.moon.planet.quasar.solar syste