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Scientists predicted this star would explode. It’s bucked expectations.
Carter’s UFO hounded him for years. Few knew his expertise in astronomy.
NASA asked for cheaper ways to get Mars samples. It had one all along.
Stunning new images of Mercury show the scorched planet’s north pole
The story behind Pluto’s huge moon bodes well for distant ocean worlds
Venus wasn’t always hell, scientists say. It may have had beaches.
