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29th Nov 2010

How fast is the universe expanding?

Diana O'Carroll

The Cosmic Microwave Background temperature fluctuations from the 5-year Wilkinson Microwave Anisotropy Probe data seen over the full sky.

Will the universe expand faster than the speed of light in the future? Is this even possible? Will there be a big crunch at the end? The answer's in this Question of the Week. Plus, we ask if it's possible to drink through your bottom!

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QotW

[as MP3]

What happens as the universe expands?

The universe is expanding at an ever-increasing rate. a) How fast is that now? b) Presumably the limit will be the speed of light - what will happen then? Will the rate of acceleration slow down as we approach the speed of light or just suddenly stop? Will the universe begin to contract after that o...


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