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James Webb telescope...

Yep, the arcs are distorted images of old red galaxies lensed by the cluster of galaxies - you can see they are concentric around "brightest cluster galaxy" - to imagine why they end up distorted into that shape, think about the distorted images you see through a crystal ball - the gravitational lens is similarly spherical.

The 6 spikes from the bright central star are caused by diffraction from the 6 edges of the hexagonal mirror segments - this gives a six spiked "point spread function" - you can only see them when the object is very bright (as the spikes are really very faint compared to the object) but are in fact present for every source in the image.
 
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Wow. So how long ago is that?

I read they had a closed room meeting with Biden and a couple of others first - so have they found life yet? Have they photoshopped out the Golden Arches?
 

There’s also a NASA stream but it seems really glitchy for some reason, the PBS is the same thing but seems much better quality. Scroll to about 50 minutes for the real start.
 
Very impressive indeed and worth waiting for, but just think how much better the pictures could be if the scientists had applied some fo.q tape to the reverse of each mirror
 
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