每日一图 | Page 62 of 97

帝国大厦为毅力号火星车亮灯

ByNASA中文 2021年2月17日2021年2月20日

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 geology and past climate, pave the way for human exploration of the Red Planet, and be the first mission to collect and cache Martian rock and regolith. Image Credit: NASA/Emma Howells 2021年2月16日(周二)，纽约市帝国大厦被点亮成红色，庆祝美国宇航局(NASA)的毅力号(Perseverance)火星车计划于本周四登陆火星。毅力号火星任务的一个关键目标是天体生物学，包括寻找古代微生物生命的迹象。探测器将描述火星的地质和过去的气候，为人类探索这颗红色星球铺平道路，并将成为第一个收集和隐藏火星岩石和风化层的任务。图片来源:NASA/Emma Howells

NASA·每日一图

天体生物学家肯达·林奇利用地球上的类似物在火星上寻找生命

ByNASA中文 2021年2月17日2021年2月17日

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 her doctorate, she worked as a systems engineer for the International Space Station Program and as a research engineer for the Astromaterials and Exploration Science directorate, both at NASA’s Johnson Space Center. Hence, she combines her engineering experience with her science training to work across multiple disciplines within the astrobiology community. Lynch’s current research focuses on studying life in hypersaline environments because recent data suggest the brines and salts are likely ubiquitous…

NASA·每日一图

伯纳德·哈里斯：第一位非裔美国人太空行走者

ByNASA中文 2021年2月13日2021年2月13日

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 Credit: NASA 伯纳德·哈里斯是一名医生、飞行外科医生和美国宇航局宇航员，1995年2月，在发现号航天飞机执行STS-63任务期间，他成为第一位进行太空行走的非裔美国人。这是一次史无前例的任务。这也是航天飞机第一次与俄罗斯和平号空间站对接。查看黑人历史月图片画廊。图片来源:美国国家航空航天局

NASA·每日一图

水晶般清澈：观察空间站上的晶体生长

ByNASA中文 2021年2月12日2021年2月12日

There are more than 100,000 proteins in the human body. Every structure is different, and each one of them holds important information related to our health. Each protein has a unique and complicated structure that is closely related to its function. Therefore, revealing a protein’s structure leads to an understanding of its function. However, it is difficult to analyze protein structures here on Earth, where gravity interferes with optimal growth. Previous research has shown that microgravity produces high-quality protein crystals that can be analyzed to identify possible targets for drugs to treat disease. The Real-Time Protein Crystal Growth 2 study will produce high-quality protein crystals for up to eight proteins that will undergo detailed analysis back on Earth. Astronauts will observe the crystals, report on…

NASA·每日一图

煤袋星云

ByNASA中文 2021年2月11日2021年2月11日

This stunning image captures a small region on the edge of the inky Coalsack Nebula, or Caldwell 99. Caldwell 99 is a dark nebula — a dense cloud of interstellar dust that completely blocks out visible wavelengths of light from objects behind it. The object at the center of the image is a (much smaller) protoplanetary nebula. The protoplanetary nebula phase is a late stage in the life of a star in which it has ejected a shell of hydrogen gas and is quickly heating up. This stage only lasts for a few thousand years before the protoplanetary nebula’s central star reaches roughly 30,000 Kelvin (approximately 17,000 degrees Fahrenheit). At this point, the central star is producing enough energy to make its surrounding shell of…

NASA·每日一图

太平洋上空的日出

ByNASA中文 2021年2月10日

This view of a sunrise breaking through the Earth’s horizon was taken on Feb 3, 2021, as the International Space Station orbited 271 miles above the Pacific Ocean off the coast of southern Chile in South America. The space station, humanity’s only orbital laboratory, orbits the Earth about every 90 minutes, witnessing around 16 sunrises each day. Image Credit: NASA 这张冲破地球地平线的日出照片拍摄于2021年2月3日，当时国际空间站在距南美洲智利南部海岸271英里的太平洋上空环绕飞行。国际空间站是人类唯一的轨道实验室，它每90分钟绕地球公转一圈，每天见证大约16次日出。图片来源:美国国家航空航天局

NASA·每日一图

珍妮特·埃普斯：宇航员和航空航天工程师

ByNASA中文 2021年2月8日2021年2月8日

In this image from 2018, NASA astronaut Jeanette Epps trains in a U.S. spacesuit at the Johnson Space Center. Epps is assigned to NASA’s Boeing Starliner-1 mission, the first operational crewed flight of Boeing’s CST-100 Starliner spacecraft on a mission to the International Space Station. She will join NASA astronauts Sunita Williams and Josh Cassada for a six-month expedition planned for launch in 2021 to the orbiting space laboratory. The flight will follow NASA certification after a successful uncrewed Orbital Flight Test-2 and Crew Flight Test with astronauts. The spaceflight will be the first for Epps, who earned a doctorate in aerospace engineering in 2000, from the University of Maryland, College Park. While earning her doctorate, Epps was a NASA Graduate Student Researchers Project fellow,…

NASA·每日一图

这张照片摄于小麦哲伦星云的“翅膀”下

ByNASA中文 2021年2月7日2021年2月7日

The tip of the “wing” of the Small Magellanic Cloud galaxy is dazzling in this 2013 view from NASA’s Great Observatories. The Small Magellanic Cloud, or SMC, is a small galaxy about 200,000 light-years way that orbits our own Milky Way spiral galaxy. The colors represent wavelengths of light across a broad spectrum. X-rays from NASA’s Chandra X-ray Observatory are shown in purple; visible-light from NASA’s Hubble Space Telescope is colored red, green and blue; and infrared observations from NASA’s Spitzer Space Telescope are also represented in red. The spiral galaxy seen in the lower corner is actually behind this nebula. Other distant galaxies located hundreds of millions of light-years or more away can be seen sprinkled around the edge of the image. The SMC…

NASA·每日一图

1971年2月4日，阿波罗14号到达月球轨道

ByNASA中文 2021年2月4日2021年2月4日

Apollo 14 arrived in lunar orbit on Feb. 4, 1971, to prepare for the landing in and exploration of the Fra Mauro highlands. Apollo 14 launched carrying astronauts Commander Alan Shepard, lunar module pilot Edgar Mitchell, and command module pilot Stuart Roosa. Engineers had modified the spacecraft to prevent a recurrence of the accident that crippled Apollo 13 the previous year. After their Saturn V rocket delivered them into a parking orbit around the Earth, the third stage reignited to send them on their way to the Moon. The primary mission objectives to the Fra Mauro region of the Moon centered on deployment of the Apollo Lunar Surface Experiments Package, lunar field geology investigations; collection of surface material samples for return to Earth; and deployment…

NASA·每日一图

从空间站看月球

ByNASA中文 2021年2月4日2021年2月4日

This picture of the waning gibbous Moon was taken on Jan 29, 2021, the day after its full Moon phase as the International Space Station orbited 264 miles above China near the Mongolian border. Humanity’s only orbital laboratory, the space station, orbits the Earth about 90 minutes or about 16 times every 24 hours. Image Credit: NASA 这张照片拍摄于2021年1月29日，也就是满月后的第二天，当时国际空间站在靠近蒙古边境的中国上空264英里的轨道上运行。空间站是人类唯一的轨道实验室，它绕地球轨道运行约90分钟，即每24小时运行16次。图片来源:美国国家航空航天局