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테두리
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tAGswVfizNYw |
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| I'm unemployed http://redtube.in.net/ redtube. That’s a great question. The answer is that we don’t even know how big the Universe is! We can only see a small part of our Universe – the part that light has had the time to travel across to reach us during the 13.8 billion years since the Big Bang. Anything farther away can’t be seen, simply because the light from these distant places hasn’t reached us yet. |
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Russel |
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2019-08-24 10:05:15 |
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