A sudden X-ray flare from a supermassive black hole in galaxy NGC 3783 triggered ultra-fast winds racing outward at a fifth the speed of light—an event never witnessed before. Using XMM-Newton and ...
Researchers have found a razor-thin, rotating string of galaxies inside a massive cosmic filament, revealing unexpected ...
NASA has announced when the longest total solar eclipse of the century will occur—and you won’t have to wait long. Here’s ...
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