UT: Astronomy Without A Telescope – Much Ado About Nothing

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bystander
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UT: Astronomy Without A Telescope – Much Ado About Nothing

Post by bystander » Sun Apr 11, 2010 3:37 am

Astronomy Without A Telescope – Much Ado About Nothing
Universe Today - 2010 Apr 10

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Steve Nerlich wrote:One of the most intriguing things in cosmology is empty space – that apparent spatial emptiness that didn’t obviously exist before the Big Bang. Although classical physics would have it that energy may neither be created or destroyed, it's certainly the case that empty space is being created in abundance as the universe expands.

This empty space is something you can move through, although moving is something you can only do over time, so we should really talk about it being space-time. There was no time before the Big Bang expansion also created space – and from there the two have always gone together as a package.
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neufer
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Re: UT: Astronomy Without A Telescope – Much Ado About Nothi

Post by neufer » Sun Apr 11, 2010 1:22 pm

Why ~15 billion years?
Why not ~14 billion years?
Art Neuendorffer