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Tag: gravity

Single supernova at four different points in space at four different points in time?

Posted on March 19, 2015 by Sid

I was trying to explain to a friend how a single supernova explosion that happened only once, at a single point in space was observed at four different points in space AND at four different times (50-80 years apart!). The key is gravitational lensing and I suspect I didn’t explain it very well because of…

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