domenicabravo19 domenicabravo19

21-10-2015
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what do you think that astronomers mean when they use the term observable universe?
Help me guys pleaseeeeee!!! :D

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Аноним Аноним

21-10-2015

They mean the part of the universe that we can see with the naked eye, through telescope, or the amount of light years we can travel without dying

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