两球宇宙(Two- sphere Universe) 我们已经知道埃及人和巴比伦人观察了太阳的运动，观察了星星的变化（星 星的相对位置不变），知道所有天体会日复一日地升起降落...
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基督手中的玻璃球，一个代表世界或宇宙的形象，让你想起达·芬奇在科学方面的探索，想起他对于宏观宇宙之中的人类的思考，想起他的人生哲学。
The glassy orb, an image of the world or the cosmos, makes you think of Leonardo's scientific research and his philosophy of the microcosm of the human being within the macrocosm of the universe.
研究者说对称的，各向同性的宇宙应该是形成于一个球对称的大爆炸中。
The researchers say that the symmetric and isotropic universe should have formed from a spherically symmetric explosion.
对日球层和它过滤宇宙射线的机制了解的越多，就越有助于评估人类星际航行安全性。
Understanding more about the heliosphere and its ability to filter out galactic cosmic rays could be critical for assessing the safety of human space travel, Schwadron notes.
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