Neptune is cold, blue, stormy, and still deeply mysterious. Voyager, James Webb, and modern observations reveal dark spots, ...
James Webb found Neptune's moon Nereid has an unusual icy surface, suggesting it formed alongside the planet instead of being captured later.
Neptune’s moons have long provided evidence of a cataclysm four billion years ago. A new study suggests one moon may have made it through. By Jonathan O’Callaghan Neptune’s moon system is bizarre.