NASA·每日一图 | Page 61 of 146

天市右垣十一（蛇夫座ζ）：一颗有着复杂过去的恒星

ByNASA中文 2022年7月30日2022年7月30日

Zeta Ophiuchi is a star with a complicated past, having likely been ejected from its birthplace by a powerful stellar explosion. A new look by NASA’s Chandra X-ray Observatory helps tell more of the story of this runaway star. Located about 440 light-years from Earth, Zeta Ophiuchi is a hot star that is 20 times more massive than the Sun. Previous observations have provided evidence that Zeta Ophiuchi was once in close orbit with another star, before being ejected at about 100,000 miles per hour when this companion was destroyed in a supernova explosion over a million years ago. Previously released infrared data from NASA’s now-retired Spitzer Space Telescope, seen in this new composite image, reveals a spectacular shock wave (red and green) that was…

NASA·每日一图

木星北极附近的漩涡

ByNASA中文 2022年7月29日2022年7月29日

As NASA’s Juno mission completed its 43rd close flyby of Jupiter on July 5, 2022, its JunoCam instrument captured this striking view of vortices — hurricane-like spiral wind patterns — near the planet’s north pole. These powerful storms can be over 30 miles (50 kilometers) in height and hundreds of miles across. Figuring out how they form is key to understanding Jupiter’s atmosphere, as well as the fluid dynamics and cloud chemistry that create the planet’s other atmospheric features. A NASA citizen science project, Jovian Vortex Hunter, seeks help from volunteer members of the public to spot and help categorize vortices and other atmospheric phenomena visible in JunoCam photos of Jupiter. As of July 2022, 2,404 volunteers had made 376,725 classifications using the Jovian Vortex…

NASA·每日一图

进入（轨道）日出

ByNASA中文 2022年7月28日2022年7月28日

The Sun’s rays begin to illuminate the Earth’s atmosphere as the International Space Station flew into an orbital sunrise 261 miles above Texas, as seen in this image taken by astronaut Bob Hines. The crew doesn’t just snap pretty pictures; the research aboard the station benefits humanity in numerous ways. This week, the 11th annual International Space Station Research and Development Conference runs through Thursday, July 28, 2022, in Washington. The full conference agenda is available online. NASA will provide live coverage of select panels from the conference on NASA Television, the NASA app, and the agency’s website. The event coincides with the publication of the 2022 edition of the International Space Station Benefits for Humanity, highlighting the advances in scientific knowledge on Earth, and…

NASA·每日一图

为下一代飞行做准备

ByNASA中文 2022年7月27日2022年7月27日

Before NASA’s quiet supersonic X-59 aircraft takes to the skies, plenty of testing happens to ensure a safe first flight. One part of this safety check is to analyze data collected for the X-59’s flight control system through low-speed wind tunnel tests. The X-59 is central to NASA’s Quesst mission to expand supersonic flight and provide regulators with data to help change existing national and international aviation rules that ban commercial supersonic flight over land. The aircraft is designed to produce a gentle thump instead of a sonic boom. Recently, Lockheed Martin’s Skunk Works facility in Palmdale, California, completed low-speed wind tunnel tests of a scale model of the X-59’s forebody. The tests provided measurements of how wind flows around the aircraft nose and confirmed…

NASA·每日一图

红色星球上的蓝色涟漪

ByNASA中文 2022年7月26日2022年7月26日

Though Mars is the Red Planet, false-color images can help us learn about its weather and geology. This image shows a variety of wind-related features on the Red Planet near the center of Gamboa Crater. Larger sand dunes form sinuous crests and individual domes. There are tiny ripples on the tops of the dunes, only several feet from crest-to-crest. These merge into larger mega-ripples about 30 feet apart that radiate outward from the dunes. The larger, brighter formations that are roughly parallel are called “Transverse Aeolian Ridges” (TAR). These TAR are covered with very coarse sand. The mega-ripples appear blue-green on one side of an enhanced color cutout while the TAR appear brighter blue on the other. This could be because the TAR are actively…

NASA·每日一图

地球资源卫星50周年

ByNASA中文 2022年7月24日2022年7月24日

We’re celebrating 50 years of the Landsat satellite, the first of which launched on July 23, 1972. The latest in the series, Landsat 9, launched in September 2021. Landsat shows us Earth from space. For 50 years, the mission has collected data on the forests, farms, urban areas and freshwater of our home planet, generating the longest continuous record of its kind. Decision makers from across the globe use freely available Landsat data to better understand environmental change, manage agricultural practices, allocate scarce water resources, respond to natural disasters and more. This natural color image of Eleuthera Island, the Bahamas, was taken by Landsat 9 on January 18, 2022. Between Landsat 8 and Landsat 9, the Landsat program delivers complete coverage of the Earth’s surface…

NASA·每日一图

这是城市环境范围自主组合导航测试

ByNASA中文 2022年7月22日2022年7月22日

An Alta-X drone operated by NASA researchers flies over NASA Langley’s City Environment Range Testing for Autonomous Integrated Navigation (CERTAIN) as part of the Advanced Air Mobility project’s High Density Vertiplex (HDV) testing in April 2022. HDV is developing the necessary systems to enable urban drone flights that travel beyond visual sight. Learn more NASA Vertiport Research Takes Flight Image Credit: NASA/Robert Lorkiewicz 作为2022年4月高级空中交通项目高密度垂直复合（HDV）测试的一部分，由NASA研究人员操作的Alta-X无人机飞越NASA兰利的城市环境范围自主组合导航测试（CERTAIN）。 HDV正在开发必要的系统，以使城市无人机能够在视觉之外飞行。了解更多信息 NASA垂直运输研究所开始飞行图片来源：NASA/Robert Lorkiewicz

NASA·每日一图

阿波罗11号机组人员为静海之旅进行训练

ByNASA中文 2022年7月21日2022年7月21日

The Apollo 11 crew simulates deploying and using lunar tools on the surface of the Moon during a training exercise on April 22, 1969. Lunar module pilot Buzz Aldrin (left) uses a scoop and tongs to pick up a soil sample. Mission Commander Neil Armstrong holds a bag to receive the sample. In the background is a Lunar Module mockup. On July 16, 1969, the crew off Apollo 11, including command module pilot Michael Collins, launched into history on a journey to explore Earth’s only natural satellite. Landing on the Moon’s Mare Tranquillitatis, or Sea of Tranquility, on July 20, 1969, Armstrong and Aldrin became the first people to walk on another terrestrial body. At 5 p.m. EDT (21:00 UTC) on July 20, 2022, NASA…

NASA·每日一图

超新星的冲击波

ByNASA中文 2022年7月20日2022年7月20日

Supernovas are the explosive deaths of the universe’s most massive stars. In death, these objects blast powerful waves into the cosmos, destroying much of the dust surrounding them. This 2007 composite from NASA’s Spitzer Space Telescope and Chandra X-ray Observatory shows the remnant of such an explosion, known as N132D, and the environment it is expanding into. In this image, infrared light at 4.5 microns is mapped to blue, 8.0 microns to green, and 24 microns to red. Meanwhile, broadband X-ray light is mapped purple. The remnant itself is seen as a wispy pink shell of gas at the center of this image. The pinkish color reveals an interaction between the explosion’s high-energy shockwaves (originally purple) and surrounding dust grains. Outside of the central remnant,…

NASA·每日一图

俯瞰：1966年左右的零重力设施

ByNASA中文 2022年7月19日2022年7月19日

This tunnel view looking up from Level 5 is of the Zero Gravity Facility at Lewis Research Center, now known as John H. Glenn Research Center at Lewis Field, and was taken in Cleveland, Ohio, on Sept. 12, 1966. The tower dropped 460 feet and allowed scientists to perform 5.18 seconds of microgravity research. By comparison, the Washington Monument is 555 feet tall. Image Credit: NASA 这张从5楼俯瞰的隧道图是刘易斯研究中心的零重力设施，现为刘易斯场的约翰·H·格伦研究中心，于1966年9月12日在俄亥俄州克利夫兰拍摄。从该塔下降460英尺，使科学家能够进行5.18秒的微重力研究。相比之下，华盛顿纪念碑高555英尺。图片来源：美国宇航局