
十万个为什么(1)地球与宇宙
星星为什么眨眼睛?
地球上的氧气会耗尽吗?
宇宙有外星人吗?
。。。。。。
4大科普主题之一《地球与宇宙》
小朋友最好奇的问题,
内容简单有趣,科学权威,
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The question of reaching the edge of the universe is impossible due to its ongoing expansion and infinite nature. As objects recede at near-light speeds, it would take an eternity for current technology to reach even remotely distant regions. The concept of a "boundary" in an expanding, potentially curved universe is ill-defined, suggesting that no matter how far one travels, they will never return to their starting point, given the cosmos"s infinite expanse.
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