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Biggest comet from outer solar system ever seen is 137 kilometres wide

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Astronomers have calculated the size of a ‘mega comet’ originating in the Oort Cloud, a cluster of icy bodies that surrounds our solar system Space 4 February 2022 By Jonathan O’Callaghan Illustration of the comet Bernardinelli-Bernstein as it might look in the outer solar system NOIRLab/NSF/AURA/J. da Silva Astronomers have confirmed that a “mega comet” … Read more

Our Sun May Have Been Born With a Trouble-Making Twin Called ‘Nemesis’

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A recent model on how stars are formed adds weight to the hypothesis that most – if not all – stars are born in a litter with at least one sibling. Our own star at the center of the Solar System is probably no exception, and some astronomers suspect that the Sun’s estranged twin might … Read more