保护地球，探索宇宙，发现文明
2023年12月11日 Solar Minimum versus Solar Maximum Video Credit: NASA, SDO, SVS Explanation: The surface of our Sun is constantly changing. Some years it is quiet, showing relatively few sunspots and active regions. Other years it is churning, showing many sunspots and throwing frequent Coronal Mass Ejections (CMEs) and flares. Reacting to magnetism, our SunR...
2023年11月19日 Space Station, Solar Prominences, Sun Image Credit & Copyright: Mehmet Ergün Explanation: That’s no sunspot. It’s the International Space Station (ISS) caught passing in front of the Sun. Sunspots, individually, have a dark central umbra, a lighter surrounding penumbra, and no Dragon capsules attached. By contrast, the ISS is a ...
2023年10月29日 A Partial Lunar Eclipse Image Credit & Copyright: Orazio Mezzio Explanation: What’s happened to the Moon? Within the last day, part of the Moon moved through the Earth’s shadow. This happens about once or twice a year, but not every month since the Moon’s orbit around the Earth is slightly tilted. Pictured here, the face of...
2023年10月25日 Gone in 60 Seconds: A Green Flash Sunset Video Credit & Copyright: Tengyu Cai Explanation: In 60 seconds, this setting Sun will turn green. Actually, the top of the Sun already appears not only green, but wavey — along with all of its edges. The Sun itself is unchanged — both effects are caused by looking along hot and cold layer...
2023年10月14日 Circular Sun Halo Image Credit & Copyright: Vincenzo Mirabella Explanation: Want to see a ring around the Sun? It’s easy to do in daytime skies around the world. Created by randomly oriented ice crystals in thin high cirrus clouds, circular 22 degree halos are visible much more often than rainbows. This one was captured by smart phone ...
八月的天空会发射什么？在黄昏和黎明看到土星，英仙座流星的回归，还有一颗“超级蓝月”。
2023年8月1日 Monster Solar Prominence Image Credit & Copyright: Mike Wenz Explanation: The monsters that live on the Sun are not like us. They are larger than the Earth and made of gas hotter than in any teapot. They have no eyes, but at times, many tentacles. They float. Usually, they slowly change shape and just fade back onto the Sun over about a month....
2023年7月11日 Sunspots on an Active Sun Image Credit: NASA, SDO; Processing & Copyright: Şenol Şanlı Explanation: Why is our Sun so active now? No one is sure. An increase in surface activity was expected because our Sun is approaching solar maximum in 2025. However, last month our Sun sprouted more sunspots than in any month during the entire previous 11-...
七月的天空会发生什么？火星和金星分道扬镳，土星与一颗充满尘埃的年轻恒星一起巡游，这是观测银河系的黄金时段。
2023年6月11日 The Sun and Its Missing Colors Image Credit: Nigel Sharp (NSF), FTS, NSO, KPNO, AURA, NSF Explanation: Here are all the visible colors of the Sun, produced by passing the Sun’s light through a prism-like device. The spectrum was created at the McMath-Pierce Solar Observatory and shows, first off, that although our white-appearing Sun emits l...