保护地球，探索宇宙，发现文明
2023年9月17日 Moon Mountains Magnified during Ring of Fire Eclipse Credit & Copyright: Wang Letian (Eyes at Night) Explanation: What are those dark streaks in this composite image of a solar eclipse? They are reversed shadows of mountains at the edge of the Moon. The center image, captured from Xiamen, China, has the Moon’s center directly in front o...
2023年9月16日 Fireball over Iceland Image Credit & Copyright: Jennifer Franklin Explanation: On September 12, from a location just south of the Arctic Circle, stones of Iceland’s modern Arctic Henge point skyward in this startling scene. Entertaining an intrepid group of aurora hunters during a geomagnetic storm, alluring northern lights dance across...
2023年9月15日 Venus, Moon, and the Smoking Mountain Image Credit & Copyright: Luis Miguel Meade Rodríguez Explanation: Venus has returned as a brilliant morning star. From a window seat on a flight to Mexico City, the bright celestial beacon was captured just before sunrise in this astronomical snapshot, taken on September 12. Venus, at the upper right, sh...
这张来自NASA詹姆斯·韦伯太空望远镜的HH 211的照片显示了一颗0级原恒星的外流，这颗原恒星是一颗类似太阳的年前恒星，当时它的年龄不超过几万年，质量只有现在太阳的8%（它最终会成长为一颗像太阳一样的恒星）。
The Visible Infrared Imaging Radiometer Suite on the National Oceanic and Atmospheric Administration’s NOAA-20 satellite captured this image of fragmented ice in Hudson Bay on June 28, 2023. The sea ice typically melts away between June and August, and the bay begins to freeze over again in late October or November. The ebb and flow of ice and its distributi...
2023年9月14日 NGC 7331 and Beyond Image Credit & Copyright: Ian Gorenstein Explanation: Big, beautiful spiral galaxy NGC 7331 is often touted as an analog to our own Milky Way. About 50 million light-years distant in the northern constellation Pegasus, NGC 7331 was recognized early on as a spiral nebula and is actually one of the brighter galaxies not incl...
NASA的詹姆斯·韦伯太空望远镜提供了新的能力来仔细审查和完善哈勃常数危机的一些最强有力的观测证据。来自约翰斯·霍普金斯大学和太空望远镜科学研究所的诺贝尔奖获得者亚当·里斯（Adam Riess）介绍了他和他的同事最近利用韦伯观测提高哈勃常数局部测量精度的工作。
Justin Hall lands the Dryden Remotely Operated Integrated Drone 2 (DROID 2) aircraft at NASA’s Armstrong Flight Research Center in Edwards, California, on Aug. 22, 2023, as part of the Advanced Exploration of Reliable Operation at Low Altitudes: Meteorology, Simulation and Technology campaign. The data gathered by studying wind from the ground to 2,000...
2023年9月13日 NGC 4632: Galaxy with a Hidden Polar Ring Credit: Jayanne English (U. Manitoba), Nathan Deg (Queen’s University) & WALLABY Survey, CSIRO/ASKAP, NAOJ/Subaru Telescope; Text: Jayanne English (U. Manitoba) Explanation: Galaxy NGC 4632 hides a secret from optical telescopes. It is surrounded by a ring of cool hydrogen gas orbiting at 90 deg...
In this image from July 24, 2023, astronaut Frank Rubio completes a session on the Surface Avatar Remote Control Terminal, which investigates how haptic controls, user interfaces, and virtual reality could command and control surface-bound robots from long distances. While aboard the International Space Station, Rubio has worked on several experiments involv...