保护地球，探索宇宙，发现文明
2023年9月19日 HH 211: Jets from a Forming Star Credit: NASA, ESA, CSA, Webb; Processing: Tom Ray (DIAS Dublin) Explanation: Do stars always create jets as they form? No one is sure. As a gas cloud gravitationally contracts, it forms a disk that can spin too fast to continue contracting into a protostar. Theorists hypothesize that this spin can be reduced by exp...
盖迪斯山脊（Gediz Vallis Ridge）被认为是强大的古代泥石流的遗迹，是探测器科学团队长期寻找的目的地。
2023年9月18日 The Red Sprite and the Tree Credit & Copyright: Maxime Villaeys Explanation: The sprite and tree could hardly be more different. To start, the red sprite is an unusual form of lightning, while the tree is a common plant. The sprite is far away — high in Earth’s atmosphere, while the tree is nearby — only about a football fie...
“From an early age, I wanted to be an astronaut. I remember going to Kennedy Space Center Visitor Center when I was 7 on a family trip, and we got to see the rockets in the Rocket Garden and learn all about the Moon landings. I had no idea that humanity had ever been in space, much less landed on the Moon. When my family moved from Colombia to the United Sta...
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...