保护地球，探索宇宙，发现文明
2021年02月18日 Swiss Alps, Martian Sky Image Credit & Copyright: Jens Bydal Explanation: Taken on February 6, this snowy mountain and skyscape was captured near Melchsee-Frutt, central Switzerland, planet Earth. The reddish daylight and blue tinted glow around the afternoon Sun are colors of the Martian sky, though. Of course both worlds have the same Sun....
In New York City on Tuesday, Feb. 16, 2021, the Empire State Building is illuminated in red to celebrate this Thursday’s scheduled landing on Mars of NASA’s Perseverance rover. A key objective for Perseverance’s mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planet’s geol...
If we find life on the Red Planet, we’ll have astrobiologists like Dr. Kennda Lynch to thank. Lynch is an astrobiologist and geomicrobiologist studying life in extreme environments on Earth as models for characterizing habitable environments and searching for biosignatures on other planetary bodies in our solar system and elsewhere. Prior to obtaining ...
2021年02月17日 Sun Pillar with Upper Tangent Arc Image Credit & Copyright: Mike Cohea Explanation: This was not a typical sun pillar. Just after sunrise two weeks ago in Providence, Rhode Island, USA, a photographer, looking out his window, was suddenly awestruck. The astonishment was caused by a sun pillar that fanned out at the top. Sun pillars, singular...
2021年02月16日 Perseverance: Seven Minutes to Mars Video Credit: NASA, JPL Explanation: How hard is it to land safely on Mars? So hard that many more attempts have failed than succeeded. The next attempt will be on Thursday. The main problem is that the Martian atmosphere is too thick to ignore — or it will melt your spacecraft. On the other hand, the atm...
2021年02月15日 Landing on Mars: Seven Minutes of Terror Video Credit: NASA, JPL Explanation: Starting Thursday, there may be an amazing new robotic explorer on Mars. Or there may be a new pile of junk. It all likely depends on things going correctly in the minutes after the Mars 2020 mission arrives at its new home planet and attempts to deploy the Perseverance...
2021年02月14日 Long Stem Rosette Nebula Image Credit & Copyright: Adam Block & Tim Puckett Explanation: Would the Rosette Nebula by any other name look as sweet? The bland New General Catalog designation of NGC 2237 doesn’t appear to diminish the appearance of this flowery emission nebula, at the top of the image, atop a long stem of glowing hyd...
通过美国宇航局的凌日系外行星勘测卫星(TESS)的观测，一个国际天文学家团队发现了三个比地球大的热星球，围绕着一个年轻得多的名为TOI 451的恒星运行。该系统位于最近发现的双鱼座-波江座星流中，这是一组年龄不到我们太阳系3%的恒星，横跨了三分之一的天空。 这张插图勾勒出TOI 451的主要特征，这是一个位于波江座400光年之外的三重行星系统。 来源:美国宇航局戈达德太空飞行中心 这些行星是在2018年10月至12月间拍摄的TESS照片中发现的。对TOI 451及其行星的低阶研究包括2019年和2020年使用NASA的斯皮策太空望远镜（现已退役）以及许多地面设施进行的观测。NASA近地天体广域红外探测卫星(NEOWISE)在2009年到2011年期间收集的红外数据显示，该系统保留着由尘埃和岩石碎片组成的冷盘。其...
A physician, flight surgeon, and NASA astronaut, Bernard Harris became the first African American to perform a spacewalk in February 1995, during space shuttle Discovery’s STS-63 mission. This was a mission of firsts. It was also the first time a shuttle rendezvoused with the Russian Mir space station. View the Black History Month Image Gallery. Image ...
2021年02月13日 Stereo Eros Image Credit: NEAR Project, JHU APL, NASA Explanation: Get out your red/blue glasses and float next to asteroid 433 Eros. Orbiting the Sun once every 1.8 years, the near-Earth asteroid is named for the Greek god of love. Still, its shape more closely resembles a lumpy potato than a heart. Eros is a diminutive 40 x 14 x 14 kilometer wo...