Astronomers have spotted the most distant and brightest "space laser," or megamaser, ever seen, and it's blasting out from a collision between galaxies that occurred when the universe was just half ...
This artist’s impression shows two tiny but very dense neutron stars at the point at which they merge and explode. ESO/L. Calçada/M. Kornmesser, CC BY Billions of light years away in a remote part of ...
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