鸟神星与卫星
2022年12月31日 Moon over Makemake Illustration Credit: Alex H. Parker (Southwest Research Institute) Explanation: Makemake (sounds like MAH-kay MAH-kay), second brightest dwarf planet of the Kuiper belt, has a moon. Nicknamed MK2, Makemake’s moon reflects sunlight with a charcoal-dark surface, about 1,300 times fainter than its parent body. Still, in 2016...