THAT’S NO MOON Comets around distant stars, shown in this artist’s illustration, could be explained by “ploonets” — moons that were freed from their orbits around migrating gas giants.
LYNNETTE COOK/Fuse/NASA
THAT’S NO MOON Comets around distant stars, shown in this artist’s illustration, could be explained by “ploonets” — moons that were freed from their orbits around migrating gas giants.
LYNNETTE COOK/Fuse/NASA