钱德拉回顾19世纪40年代大喷发的故事
一个新的时间序列显示了海山二从1999年到2020年的变化。
作者： NASA中文
悠闲的游泳
A turtle moves through a waterway at NASA’s Kennedy Space Center in Florida on May 4, 2017. The center shares a border with the Merritt Island National Wildlife Refuge. More than 330 native and migratory bird species, 25 mammals, 117 fishes, and 65 amphibians and reptiles call Kennedy and the wildlife refuge home. Image Credit: NASA/Bill White 2017年5月4...
IC 4592：蓝马头反射星云
2023年9月26日 IC 4592: The Blue Horsehead Reflection Nebula Image Credit & Copyright: Antoine & Dalia Grelin Explanation: Do you see the horse’s head? What you are seeing is not the famous Horsehead nebula toward Orion, but rather a fainter nebula that only takes on a familiar form with deeper imaging. The main part of the here-imaged molecular ...
OSIRIS-REx样本返回舱降落在犹他州沙漠
The sample return capsule from NASA’s OSIRIS-REx mission is seen shortly after touching down in the desert, Sunday, Sept. 24, 2023, at the Department of Defense’s Utah Test and Training Range. The sample was collected from the asteroid Bennu in October 2020 by NASA’s OSIRIS-REx spacecraft. The Bennu sample – an estimated 8.8 ounces, or 250 grams – will...
Arp 142：蜂鸟星系
2023年9月25日 Arp 142: The Hummingbird Galaxy Image Credit: NASA, ESA, Hubble, HLA; Processing & Copyright: Basudeb Chakrabarti Explanation: What’s happening to this spiral galaxy? Just a few hundred million years ago, NGC 2936, the upper of the two large galaxies shown at the bottom, was likely a normal spiral galaxy — spinning, creating stars...
NASA首个小行星样本着陆，现已安全存放在洁净室
经过NASA OSIRIS-REx(起源，光谱解释，资源识别和安全-风化层探测器)团队多年的期待和努力工作，从小行星贝努收集的岩石和尘埃的胶囊终于到达了地球。它于周日上午8点52分（美国东部时间上午10:52）降落在盐湖城附近的国防部犹他州测试训练场的目标区域。
从新的视角看新西兰
Expedition 69 Flight Engineer Jasmin Moghbeli captured this image of New Zealand, with its snow-capped Southern Alps mountain range pictured between the partly cloudy Tasman Sea and Pacific Ocean, on Sept. 12, 2023. At the bottom right of the image, one of the International Space Station’s roll-out solar arrays is seen as the station orbited 271 miles above ...
日出带环食
2023年9月24日 A Ring of Fire Sunrise Solar Eclipse Video Credit: Colin Legg & Geoff Sims; Music: Peter Nanasi Explanation: What’s rising above the horizon behind those clouds? It’s the Sun. Most sunrises don’t look like this, though, because most sunrises don’t include the Moon. In the early morning of 2013 May 10, however, from Wes...
南半球下午的日行迹
2023年9月23日 Afternoon Analemma Image Credit & Copyright: Ian Griffin (Otago Museum) Explanation: An analemma is that figure-8 curve you get when you mark the position of the Sun at the same time each day for one year. To make this one, a 4×5 pinhole camera was set up looking north in southern New Zealand skies. The shutter was briefly opened each cl...
宇宙的倒影
2023年9月22日 Cosmos in Reflection Image Credit & Copyright: Jeff Dai (TWAN) Explanation: During the day, over 12,000 large mirrors reflect sunlight at the 100-megawatt, molten-salt, solar thermal power plant at the western edge of the Gobi desert near Dunhuang, Gansu Province, China. Individual mirror panels turn to track the sun like sunflowers. They con...