保护地球，探索宇宙，发现文明
影像来源：NASA/JPL-Caltech 翻译：灼眼的粉丝 看点： 移动的行星和螺旋星系！ 就在火星恢复能观测之际，金星本月开始从清晨的天空中消失。木星和月亮在情人节成为一对可爱的情侣。把你的望远镜对准北斗七星，寻找M81，也就是“波德星系”。 二月观星亮点： 整个月——日出前，金星在东方的天空中仍然很明亮，但它每天都在下沉，所以抓紧时间观赏它！ 整个月——黎明前的天空开始可以看到火星。它很低，还不是很亮，但在接下来的几个月里，它会越来越高，越来越亮。 2月6日——今天早上，当天空开始变亮的时候，金星和细长的新月一起出现在东方。 2月9日——新月。 2月14日——今晚，在日落后的西南高处，在木星附近可以看到新月。 2月22日至28日——本周，当火星和金星上升时，东南方向视野开阔的人可以近距离观测火星和金星。 ...
2024年1月13日 Circling the Sun Image Credit & Copyright: Radoslav Zboran Explanation: Earth’s orbit around the Sun is not a circle, it’s an ellipse. The point along its elliptical orbit where our fair planet is closest to the Sun is called perihelion. This year, perihelion was on January 2 at 01:00 UTC, with the Earth about 3 million miles close...
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-...