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Was there space before big bang? Or who knows there might be different heavenly bodies that we might not perceive?

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    $\begingroup$ This question has already been addressed several times. $\endgroup$
    – David H
    Commented Feb 8, 2014 at 11:43
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    $\begingroup$ No there is no answer anywhere on this site. $\endgroup$
    – user979
    Commented Feb 8, 2014 at 12:34
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    $\begingroup$ @user979, See physics.SE there are better answers there. $\endgroup$
    – Pacerier
    Commented May 27, 2015 at 7:24

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"What happened before the Big Bang" is like asking what Alexander the Great's phone number was. It's a nonsensical question.

Space and time began with the Big Bang. "When" and "where" began with the Big Bang.

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The answer to this questions turns out to be a "yes". The big bang is a sudden rapid expansion of space, so yes, there was space before the big bang. To understand more, check this vulgarization video by MinutePhysics who corrects some misconceptions about the BB, since you seem to not know the Friedmann-Walker-Robertson-Lemaître metric.

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