2023年3月13日 Rainbow Tree Image Credit & Copyright: Eric Houck Explanation: What lies at the end of a rainbow? Something different for everyone. For the photographer taking this picture, for example, one end of the rainbow ended at a tree. Others nearby, though, would likely see the rainbow end s […]
2023年3月12日 Saturn’s Hyperion: A Moon with Odd Craters Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team Explanation: What lies at the bottom of Hyperion’s strange craters? To help find out, the robot Cassini spacecraft that once orbited Saturn swooped past the sponge-textured moon
2023年3月11日 3D Bennu Image Credit: NASA, GSFC, U. Arizona – Stereo Image Copyright: Patrick Vantuyne Explanation: Put on your red/blue glasses and float next to asteroid 101955 Bennu. Shaped like a spinning toy top with boulders littering its rough surface, the tiny Solar System world is about
2023年3月10日 Orion and the Running Man Image Credit & Copyright: Abraham Jones Explanation: Few cosmic vistas excite the imagination like The Great Nebula in Orion. Visible as a faint celestial smudge to the naked-eye, the nearest large star-forming region sprawls across this sharp telescopic ima
2023年3月9日 DART vs Dimorphos Image Credit: NASA, Johns Hopkins APL, DART Explanation: On the first planetary defense test mission from planet Earth, the DART spacecraft captured this close-up on 26 September 2022, three seconds before slamming into the surface of asteroid moonlet Dimorphos. The space
2023年3月8日 Artificial Night Sky Brightness Image Credit: Data: JPSS Satellites; Processing: David J. Lorenz Explanation: Where have all the dim stars gone? From many places on the Earth including major cities, the night sky has been reduced from a fascinating display of thousands of stars to a diffus
2023年3月7日 Deep Field: The Large Magellanic Cloud Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN) Explanation: Is this a spiral galaxy? No. Actually, it is the Large Magellanic Cloud (LMC), the largest satellite galaxy of our own Milky Way Galaxy. The LMC is cla
2023年3月6日 Jupiter and Venus from Earth Image Credit & Copyright: Marek Nikodem (PPSAE) Explanation: It was visible around the world. The sunset conjunction of Jupiter and Venus in 2012 was visible almost no matter where you lived on Earth. Anyone on the planet with a clear western horizon at su
2023年3月5日 Jupiter and Venus over Italy Image Credit & Copyright: Giovanni Tumino Explanation: What are those two bright spots? Planets. A few days ago, the two brightest planets in the night sky passed within a single degree of each other in what is termed a conjunction. Visible just after suns
2023年3月4日 10 Days of Venus and Jupiter Image Credit & Copyright: Soumyadeep Mukherjee Explanation: Venus and Jupiter may have caught your attention lately. The impending close conjunction of the two brightest planets visible in clear evening skies has been hard to miss. With Jupiter at the top,
