2023年11月4日 Dinkinesh Moonrise Image Credit: NASA/Goddard, SwRI, Johns Hopkins APL, NOIRLab Explanation: Last Wednesday the voyaging Lucy spacecraft encountered its first asteroid, 152830 Dinkinesh, and discovered the inner-main belt asteroid has a moon. From a distance of just over 400 kilometers, L […]
2023年11月2日 The Fornax Cluster of Galaxies Image Credit & Copyright: Marcelo Rivera Explanation: Named for the southern constellation toward which most of its galaxies can be found, the Fornax Cluster is one of the closest clusters of galaxies. About 62 million light-years away, it’s over
2023年11月1日 Annular Solar Eclipse over Utah Image Credit & Copyright: MaryBeth Kiczenski Explanation: Part of the Sun disappeared earlier this month, but few people were worried. The missing part, which included the center from some locations, just went behind the Moon in what is known as an ann
2023年10月31日 Halloween and the Wizard Nebula Image Credit & Copyright: Richard McInnis Explanation: Halloween’s origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) a
2023年10月30日 Reflections of the Ghost Nebula Image Credit & Copyright: Bogdan Jarzyna Explanation: Do any shapes seem to jump out at you from this interstellar field of stars and dust? The jeweled expanse, filled with faint, starlight-reflecting clouds, drifts through the night in the royal cons
2023年10月28日 The Ghosts of Gamma Cas Image Credit & Copyright: Guillaume Gruntz, Jean-François Bax Explanation: Gamma Cassiopeiae shines high in northern autumn evening skies. It’s the brightest spiky star in this telescopic field of view toward the constellation Cassiopeia. Gamma Cas shar
2023年10月26日 Orionids in Taurus Image Credit & Copyright: David Cortner Explanation: History’s first known periodic comet, Comet Halley (1P/Halley), returns to the inner Solar System every 76 years or so. The famous comet made its last appearance to the naked-eye in 1986. But dusty debris
