As I read the NY Times article below, I was reminded of Grav's posting,
and I'm really surprised that I found it starting this thread.
I think this article and the video that accompany it fit the title verywell.
(I'm sorry the NYTimes has stuck an autostart ad into their website,
but the video describing this article is worth the wait.)
Astronomers Watch a Supernova and See Reruns
NY Times - DENNIS OVERBYE = MARCH 5, 2015
Quote:
The star exploded more than nine billion years ago on the other side of the universe,
too far for even the Hubble to see without special help from the cosmos.
In this case, however, light rays from the star have been bent and magnified
by the gravity of an intervening cluster of galaxies so that multiple images of it appear.
Four of them are arranged in a tight formation known as an Einstein Cross
surrounding one of the galaxies in the cluster. Since each light ray follows a different path from
the star to here, each image in the cross represents a slightly different moment in the supernova explosion.<snip>
“I was sort of astounded,” said Patrick Kelly of the University of California, Berkeley,
who discovered the supernova images in data recorded by the space telescope in November.
“I was not expecting anything like that at all.”
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