Comet Bernardinelli-Bernstein appears to be a substantially pristine visitor from .71 light years away in the outer Oort cloud. Although it is very large for a comet, larger than Phobos, if is dark and it's closest approach will be ...See moreComet Bernardinelli-Bernstein appears to be a substantially pristine visitor from .71 light years away in the outer Oort cloud. Although it is very large for a comet, larger than Phobos, if is dark and it's closest approach will be comparable to Saturn making it a telescopic object. But it will hang around long enough for a probe rendezvous to be possible. Written by
David Foss
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