Astronomy on MSN15m
Bennu isn't likely to hit Earth - but if it did, here's what would happenNASA's OSIRIS-REx mission reached asteroid 101955 Bennu. Two years later, the spacecraft snagged a sample of its surface, ...
YR4 has a 2.2% chance of striking Earth in seven years, but recent updates keep pushing the odds in the wrong direction.
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