保护地球，探索宇宙，发现文明
2024年1月9日 Thor’s Helmet Image Credit & Copyright: Ritesh Biswas Explanation: Thor not only has his own day (Thursday), but a helmet in the heavens. Popularly called Thor’s Helmet, NGC 2359 is a hat-shaped cosmic cloud with wing-like appendages. Heroically sized even for a Norse god, Thor’s Helmet is about 30 light-years across. In fact,...
Expedition 70 NASA astronaut Loral O’Hara has her Russian Sokol Suit pressure checked ahead of launching to the International Space Station on Sept. 15, 2023. O’Hara, currently on the station, is scheduled to spend six months there. She and her fellow Expedition 70 crew members are studying an array of microgravity phenomena to benefit humans living on and o...
2024年1月8日 The Phases of Venus Image Credit & License: Stéphane Gonzales Explanation: Venus goes through phases. Just like our Moon, Venus can appear as a full circular disk, a thin crescent, or anything in between. Venus, frequently the brightest object in the post-sunset or pre-sunrise sky, appears so small, however, that it usually requires binoculars ...
2024年1月7日 The Cat’s Eye Nebula in Optical and X-ray Image Credit: NASA, ESA, Hubble Legacy Archive; Chandra X-ray Obs.; Processing & Copyright: Rudy Pohl Explanation: To some it looks like a cat’s eye. To others, perhaps like a giant cosmic conch shell. It is actually one of the brightest and most highly detailed planetary nebula known, compo...
2024年1月6日 The Snows of Churyumov-Gerasimenko Images Credit: ESA, Rosetta, MPS, OSIRIS; UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA; Animation: Jacint Roger Perez Explanation: You couldn’t really be caught in this blizzard while standing by a cliff on periodic comet 67P/Churyumov-Gerasimenko. Orbiting the comet in June of 2016, the Rosetta spacecraft’s narr...
2024年1月5日 Trapezium: At the Heart of Orion Image Credit & Copyright: Fred Zimmer, Telescope Live Explanation: Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star C...
Amazonian leaders visit “Space for Earth,” an immersive audio-visual installation that draws from near real-time satellite data and images, in NASA’s Earth Information Center at the NASA Headquarters Mary W. Jackson Building in Washington on Nov. 17, 2023. The leaders, joined by University of Richmond faculty and NASA representatives, gathered to discuss how...
2024年1月4日 Zeta Oph: Runaway Star Image Credit: NASA, JPL-Caltech, Spitzer Space Telescope Explanation: Like a ship plowing through cosmic seas, runaway star Zeta Ophiuchi produces the arcing interstellar bow wave or bow shock seen in this stunning infrared portrait. In the false-color view, bluish Zeta Oph, a star about 20 times more massive than the Sun, li...
On March 30, 2023, NASA astronauts Kjell Lindgren, Jessica Watkins, and Robert Hines took part in STEM demonstrations with local students in Washington. Lindgren, Hines, and Watkins spent 170 days in space as part of Expeditions 67 and 68 aboard the International Space Station. While aboard, the crew studied ways to reverse the aging of immune cells, how wou...
中等强度的象限仪座流星雨活跃于12月28日至1月12日，并在1月3日夜间达到峰值。月亮会冲掉暗淡的流星，但流星雨经常会产生明亮的火流星。虽然你可能已经注意到星座是如何随季节变化的，但你知道这种变化是以每天四分钟的速度发生的吗？