凝乳
发表于 2025-3-23 11:18:44
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Iniquitous
发表于 2025-3-23 15:44:51
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开始从未
发表于 2025-3-23 18:26:26
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indigenous
发表于 2025-3-24 01:30:40
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退潮
发表于 2025-3-24 03:04:27
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因无茶而冷淡
发表于 2025-3-24 07:52:42
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Feckless
发表于 2025-3-24 12:51:40
A Historical Overview, using the language of modern physics and abstract mathematics. Yet, at its core, our cosmological knowledge is the answer to a few fundamental questions. Have you ever drifted off deep into thought, wondering: Is the universe finite or infinite? Has it existed forever? If not, when and how did it
Felicitous
发表于 2025-3-24 18:56:02
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业余爱好者
发表于 2025-3-24 21:07:47
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daredevil
发表于 2025-3-25 02:25:51
An Expanding Universeniverse beyond our Milky Way galaxy was then completely unknown, so Einstein had to make some assumptions. Following Newton, he assumed that on average matter is uniformly distributed in the cosmos. There are of course local variations, with the density of stars higher in some places and lower in ot