保护地球，探索宇宙，发现文明
On Jan. 25, 1984, President Ronald Reagan used his State of the Union address to call for NASA to build a permanent crewed space station. While Reagan’s speech took place in a broader sociopolitical context of generally heightened tensions with the Soviet Union, his remarks foreshadowed the international cooperation that has characterized the Internati...
An international team of astronomers using NASA’s James Webb Space Telescope has obtained an in-depth inventory of the deepest, coldest ices measured to date in a molecular cloud. In addition to simple ices like water, the team was able to identify frozen forms of a wide range of molecules, from carbonyl sulfide, ammonia, and methane, to the simplest complex...
iss068e041215 (Jan. 20, 2023) — NASA astronaut and Expedition 68 Flight Engineer Nicole Mann is pictured in her Extravehicular Mobility Unit, or spacesuit, during her first spacewalk. She and fellow spacewalker Koichi Wakata (out of frame) of the Japan Aerospace Exploration Agency installed a modification kit on the International Space Station’s ...
2023年1月27日 Comet ZTF: Orbital Plane Crossing Image Credit & Copyright: Dan Bartlett Explanation: The current darling of the northern night, Comet C/2022 E3 ZTF is captured in this telescopic image from a dark sky location at June Lake, California. Of course Comet ZTF has been growing brighter in recent days, headed for its closest approach to Earth on F...
2023年1月26日 Active Galaxy NGC 1275 Image Credit: NASA, ESA, Hubble Heritage, A. Fabian (University of Cambridge, UK) Explanation: Active galaxy NGC 1275 is the central, dominant member of the large and relatively nearby Perseus Cluster of Galaxies. Wild-looking at visible wavelengths, the active galaxy is also a prodigious source of x-rays and radio emission....
2023年1月25日 LDN 1622: The Boogeyman Nebula Image Credit & Copyright: Joshua Carter Explanation: To some, the dark shape looks like a mythical boogeyman. Scientifically, Lynds’ Dark Nebula (LDN) 1622 appears against a faint background of glowing hydrogen gas only visible in long telescopic exposures of the region. In contrast, the brighter reflectio...
2023年1月24日 LHS 475 b: Earth-Sized Exoplanet Illustration Credit: DeepAI’s Fantasy World Generator Explanation: If you could stand on exoplanet LHS 475 b, what might you see? No one knows for sure but pictured here is an interesting guess made by an Earth-based artificial intelligence (AI) engine. The existence of the exoplanet was indicated in data tak...
2023年1月23日 The Colliding Spiral Galaxies of Arp 274 Image Credit: NASA, ESA, Hubble; Processing & Copyright: Mehmet Hakan Özsaraç Explanation: Two galaxies are squaring off in Virgo and here are the latest pictures. When two galaxies collide, the stars that compose them usually do not. This is because galaxies are mostly empty space and, however bright,...
2023年1月22日 In Green Company: Aurora over Norway Image Credit & Copyright: Max Rive Explanation: Raise your arms if you see an aurora. With those instructions, two nights went by with, well, clouds — mostly. On the third night of returning to same peaks, though, the sky not only cleared up but lit up with a spectacular auroral display. Arms went hi...
2023年1月21日 Naked-eye Comet ZTF Image Credit & Copyright: Óscar Martín Mesonero (Organización Salmantina de la Astronáutica y el Espacio) Explanation: Comet C/2022E3 (ZTF) is no longer too dim to require a telescope for viewing. By January 19, it could just be seen with the naked eye in this rural sky with little light pollution from a location about 20 ...