2020年7月11日 The Tails of Comet NEOWISE Image Credit & Copyright: Miloslav Druckmuller (Brno University of Technology) Explanation: Comet NEOWISE (C/2020 F3) is now sweeping through northern skies. Its developing tails stretch some six degrees across this telescopic field of view, recorded from B […]
2020年7月10日 Comet NEOWISE from the ISS Image Credit: NASA, ISS Explanation: Rounding the Sun on July 3rd and currently headed for the outer Solar System, Comet NEOWISE (C/2020 F3) has been growing brighter in the predawn skies of planet Earth. From low Earth orbit it also rises before the Sun, captur
2020年7月9日 Noctilucent Clouds and Comet NEOWISE Image Credit & Copyright: Emmanuel Paoly Explanation: These silvery blue waves washing over a tree-lined horizon in the eastern French Alps are noctilucent clouds. From high in planet Earth’s mesosphere, they reflect sunlight in this predawn
2020年7月7日 Comet NEOWISE over Lebanon Image Credit & Copyright: Maroun Habib (Moophz) Explanation: A comet has suddenly become visible to the unaided eye. Comet C/2020 F3 (NEOWISE) was discovered in late March and brightened as it reached its closest approach to the Sun, inside the orbit of Merc
2020年7月6日 M43: Dust, Gas, and Stars in the Orion Nebula Image Credit: NASA, ESA, Hubble, HLA; Reprocessing & Copyright: Bryan Goff Explanation: Unspeakable beauty and unimaginable bedlam can be found together in the Orion Nebula Arguably the most famous of all astronomy nebulas, the Great Nebul
2020年7月5日 Saturn’s Northern Hexagon Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team Explanation: Why would clouds form a hexagon on Saturn? Nobody is sure. Originally discovered during the Voyager flybys of Saturn in the 1980s, nobody has ever seen anything like it anywhere else in the
2020年7月4日 Meeting in the Mesosphere Image Credit & Copyright: Stephane Vetter (TWAN, Nuits sacrees) Explanation: A sensitive video camera on a summit of the Vosges mountains in France captured these surprising fireworks above a distant horizon on June 26. Generated over intense thunderstorms, t
2020 July 3 Lynds Dark Nebula 1251 Image Credit & Copyright: Ara Jerahian Explanation: Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, the dusty molecular cloud is part of a complex of dark nebulae mapped towa
2020 July 2 The Galaxy, the Planet, and the Apple Tree Image Credit & Copyright: Kristine Richer Explanation: The Old Astronomer’s Milky Way arcs through this peaceful northern sky. Against faint, diffuse starlight you can follow dark rifts of interstellar dust clouds stretching from the
