2019-02-21   World

Neptune’s newest, tiniest moon likely fragment of bigger one

Neptune’s newest, tiniest moon likely fragment of bigger one

CAPE CANAVERAL, Fla. (AP) – Neptune’s newest and tiniest moon is probably an ancient piece of a much larger moon orbiting unusually close. In the journal Nature on Wednesday, California astronomers shine a light on the 21-mile-diameter (34-kilometer-diameter) moon Hippocamp, named after the mythological sea horse.