Year of the Comet
Comet C/2011 L4 (PANSTARRS)

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Comet C/2012 S1 (ISON)

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Web Extras

Inside the cyclic model of the universe

Some cosmologists think the Big Bang was a single event in an infinite cycle.


By Richard Talcott
Published: August 29, 2011
Abell-2151
The Hercules galaxy cluster (Abell 2151) epitomizes the universe today. Rich galaxy clusters like this congregate into even larger and more massive superclusters, which form the backbone of cosmic large-scale structure. CFHT/Jean-Charles Cuillandre/Coelum
Some cosmologists think the Big Bang was a single event in an infinite cycle.


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