保护地球，探索宇宙，发现文明
2023年10月27日 Encke and the Tadpoles Image Credit & Copyright: Dan Bartlett Explanation: History’s second known periodic comet is Comet Encke (2P/Encke). As it swings through the inner Solar System, Encke’s orbit takes it from an aphelion, its greatest distance from the Sun, inside the orbit of Jupiter to a perihelion just inside the orbit of ...
2020 January 28 Star Formation in the Tadpole Nebula Image Credit: WISE, IRSA, NASA; Processing & Copyright: Francesco Antonucci Explanation: What’s all of the commotion in the Tadpole Nebula? Star formation. Dusty emission in the Tadpole Nebula, IC 410, lies about 12,000 light-years away in the northern constellation of the Charioteer (Auriga). Th...