保护地球，探索宇宙，发现文明
2022年6月11日 The Road and the Milky Way Image Credit & Copyright: David Cruz Explanation: At night you can follow this road as it passes through the Dark Sky Alqueva reserve not too far from Alentejo, Portugal. Or you could stop, look up, and follow the Milky Way through the sky. Both stretch from horizon to horizon in this 180 degree panorama recorded on...
2022年6月6日 Milky Way Galaxy Doomed: Collision with Andromeda Pending Image Credit: NASA, ESA, Z. Levay and R. van der Marel (STScI); T. Hallas; and A. Mellinger Explanation: Will our Milky Way Galaxy collide one day with its larger neighbor, the Andromeda Galaxy? Most likely, yes. Careful plotting of slight displacements of M31’s stars relative to backg...
2022年6月3日 A 10,000 Kilometer Galactic Bridge Image Credit & Copyright: Maxime Oudoux, Jean-Francois GELY Explanation: With this creative astro-collaboration you can follow the plane of our Milky Way Galaxy as it bridges northern and southern hemisphere skies. To construct the expansive composite nightscape, skies over Observatorio El Sauce in Chile (top...
2022年5月16日 Milky Way over French Alp Hoodoos Image Credit & Copyright: Benjamin Barakat Explanation: Real castles aren’t this old. And the background galaxy is even older. Looking a bit like an alien castle, the pictured rock spires are called hoodoos and are likely millions of years old. Rare, but found around the world, hoodoos form when dense r...
2022年5月13日 The Milky Way’s Black Hole Image Credit: X-ray – NASA/CXC/SAO, IR – NASA/HST/STScI; Inset: Radio – Event Horizon Telescope Collaboration Explanation: There’s a black hole at the center of the Milky Way. Stars are observed to orbit a very massive and compact object there known as Sgr A* (say “sadge-ay-star”...
2022年4月13日 Milky Way over Devils Tower Image Credit & Copyright: MaryBeth Kiczenski Explanation: What created Devils Tower? The origin of this extraordinary rock monolith in Wyoming, USA is still debated, with a leading hypothesis holding that it is a hardened lava plume that never reached the surface to become a volcano. In this theory, the lighter roc...
2022年3月15日 A Road to the Stars Image Credit: ESO, Petr Horálek (ESO Photo Ambassador, Inst. of Physics in Opava) Explanation: Pictured — a very scenic road to the stars. The road approaches La Silla Observatory in Chile, with the ESO’s 3.6-meter telescope just up ahead. To the left are some futuristic-looking support structures for the planned Bl...
2022年3月12日 Point Reyes Milky Way Image Credit & Copyright: Dan Zafra Explanation: Northern winter constellations and a long arc of the Milky Way are setting in this night skyscape looking toward the Pacific Ocean from Point Reyes on planet Earth’s California coast. Sirius, alpha star of Canis Major, is prominent below the starry arc toward the lef...
2022年3月1日 Dueling Bands in the Night Image Credit & Copyright: Jeff Dai (TWAN) Explanation: What are these two bands in the sky? The more commonly seen band is the one on the right and is the central band of our Milky Way galaxy. Our Sun orbits in the disk of this spiral galaxy, so that from inside, this disk appears as a band of comparable brightness a...
2022年2月19日 Peculiar Galaxies of Arp 273 Image Credit & Copyright: Jason Guenzel Explanation: The spiky stars in the foreground of this backyard telescopic frame are well within our own Milky Way Galaxy. But the two eye-catching galaxies lie far beyond the Milky Way, at a distance of over 300 million light-years. Their distorted appearance is due to grav...