木卫三阴影中的木星

木卫三阴影中的木星

ByNASA中文

During its 40th close pass by Jupiter, our Juno spacecraft saw Ganymede cast a large, dark spot on the planet on Feb. 25, 2022. JunoCam captured this image from very close to Jupiter, making Ganymede’s shadow appear especially large. At the time the raw image was taken, the Juno spacecraft was about 44,000 miles (71,000 kilometers) above Jupiter’s cloud tops and 15 times closer to the planet than Ganymede. An observer at Jupiter’s cloud tops within the oval shadow would experience a total eclipse of the Sun. Total eclipses are more common on Jupiter than Earth for several reasons: Jupiter has four major moons (Ganymede, Io, Callisto, and Europa) that often pass between Jupiter and the Sun, and since Jupiter’s moons orbit in a plane…

IXPE测量爆炸的恒星残骸

IXPE测量爆炸的恒星残骸

ByNASA中文

When a massive star collapsed in the Cassiopeia constellation, it generated a supernova explosion with some of the fastest shockwaves in the Milky Way. These speedy shock waves are one of the reasons the Cassiopeia A (Cas A) supernova remnant was chosen to be our Imaging X-ray Polarimetry Explorer’s (IXPE) first observed object. This composite image, made of data from IXPE, the Chandra Observatory, and the Hubble Telescope, shows Cas A. IXPE’s investigation of Cas A from Jan. 11 to Jan. 29, 2022, added crucial information about the behavior of exploded stars’ magnetic fields: scientists found that the magnetic fields in X-rays tend to be aligned in radial, not perpendicular, directions. Polarization data also suggest that these X-rays come from turbulent regions with many different…

Crew-4机组人员在返航前合影

Crew-4机组人员在返航前合影

ByNASA中文

NASA’s SpaceX Crew-4 members Jessica Watkins, Bob Hines, Kjell Lindgren, and Samantha Cristoforetti link arms for a portrait on Oct. 14, 2022, just before boarding the Dragon Freedom crew ship and undocking from the International Space Station. During their nearly six-month science expedition aboard the orbiting laboratory, the Crew-4 astronauts continued work on investigations documenting how improvements to the space diet affect immune function and the gut microbiome, determining the effect of fuel temperature on the flammability of a material, exploring possible adverse effects on astronaut hearing from equipment noise and microgravity, and studying whether additives increase or decrease the stability of emulsions. NASA astronauts Watkins, Hines, and Lindgren, and European Space Agency astronaut Cristoforetti safely splashed down on Oct. 14, 2022, off the coast…

迪朗达克州立公园空中赏叶

迪朗达克州立公园空中赏叶

ByNASA中文

Our Operational Land Imager-2 on Landsat 9 acquired this vibrant image of deciduous trees and conifers in the Adirondack Mountains in northeast New York on Oct. 8, 2022. Adirondack Park, the largest state park in the contiguous United States, puts on a reliable show of seasonal color. Deciduous trees with especially vivid hues include sugar and red maples, as well as quaking and bigtooth aspens. Eastern larches also put on a showy display, but on this conifer, it is the needles, not leaves, that turn brilliant golden yellow in autumn. Fall color reaches its peak when air temperatures drop and shortened daylight triggers plants to slow and stop the production of chlorophyll—the molecule that plants use to synthesize food. When the green chlorophyll pigment fades,…

SpaceX Crew-4宇航员安全返回

SpaceX Crew-4宇航员安全返回

ByNASA中文

After 170 days in orbit, NASA astronauts Bob Hines, Kjell Lindgren, and Jessica Watkins and European Space Agency astronaut Samantha Cristoforetti safely splashed down Friday, Oct. 14, 2022, off the coast of Jacksonville, Florida, completing the agency’s fourth commercial crew mission to the International Space Station. Teams aboard SpaceX recovery vessels retrieved the spacecraft and astronauts. Hines, Lindgren, Watkins, and Cristoforetti traveled 72,168,935 miles during their mission and completed 2,720 orbits around Earth. Lindgren has logged 311 days in space over his two flights, and with the completion of their flight, Cristoforetti has logged 369 days in space on her two flights, making her second on the all-time list for most days in space by a woman. The Crew-4 mission was the first spaceflight for…

系统工程师安德烈斯·里维拉

系统工程师安德烈斯·里维拉

ByNASA中文

“As first-generation immigrants we have to figure things out on our own a lot of times. My parents were going through the same transition [to America] that I was going through [in high school]. We didn’t have a lot of direction. In order for me to get to the path that I’m on today, I had to figure a lot of things out on my own. Because I had to do it to survive, I think that that built into me some sense of independence and not being afraid of asking for help. I feel like those are some of my best skills, and they’ve been really useful for me in my career [as a NASA systems engineer]. “All throughout college, I worked as an…

来自穹顶号观测舱的问候

来自穹顶号观测舱的问候

ByNASA中文

Expedition 67 flight engineers Bob Hines and Jessica Watkins are all smiles in this Sept. 12, 2022, image from the International Space Station cupola. The cupola is used to monitor the arrival of spaceships and to view the Earth. Hines, Watkins, Kjell Lindgren, and European Space Agency astronaut Samantha Cristoforetti will begin the return journey to Earth on Oct. 12, 2022, with splashdown targeted for 5:41 p.m. EDT Thursday, Oct. 13. This will mark the end of a nearly six-month science mission in which members of Crew-4 conducted new and exciting scientific research in areas such as materials science, health technologies, and plant science to prepare for human exploration beyond low-Earth orbit and benefit life on Earth. Image Credit: NASA 2022年9月12日，国际空间站穹顶号观测舱上的图片显示，第67号远征队飞行工程师鲍勃·海恩斯和杰西卡·沃特金斯都面带微笑。穹顶号观测舱用于监测宇宙飞船的到达和观察地球。 海恩斯、沃特金斯、谢尔·林德格伦和欧洲航天局宇航员萨曼莎·克里斯托弗雷蒂将于2022年10月12日开始返回地球的旅程，溅落时间定于美国东部时间10月13日周四下午5点41分。这将标志着近6个月的科学任务的结束，Crew-4的机组成员在材料科学、健康技术和植物科学等领域进行了令人兴奋的新科学研究，为人类探索低地球轨道以外的空间做准备，并造福地球上的生命。 影像来源：NASA

哈勃拍摄到一对相互作用的星系

哈勃拍摄到一对相互作用的星系

ByNASA中文

The two interacting galaxies making up the pair known as Arp-Madore 608-333 seem to float side by side in this image from the NASA/ESA Hubble Space Telescope. Though they appear serene and unperturbed, the two are subtly warping one another through a mutual gravitational interaction that is disrupting and distorting both galaxies. Hubble’s Advanced Camera for Surveys captured this drawn-out galactic interaction. The interacting galaxies in Arp-Madore 608-333 are part of an effort to build up an archive of interesting targets for more detailed future study with Hubble, ground-based telescopes, and the NASA/ESA/CSA James Webb Space Telescope. To build up this archive, astronomers scoured existing astronomical catalogues for a list of targets spread throughout the night sky. They hoped to include objects already identified as…

太阳在新的一月有强烈的耀斑环

太阳在新的一月有强烈的耀斑环

ByNASA中文

The Sun released an X1 solar flare, a powerful burst of energy, captured by our Solar Dynamics Observatory (SDO) on Oct. 2, 2022. X-class are the most intense flares, while the number provides more information about its strength. For instance, an X1 flare is half as strong as an X2. While solar flares can affect radio communications, power grids, and navigation signals, harmful radiation from a solar flare cannot pass through Earth’s atmosphere to physically affect humans on the ground. By studying flares and how they affect our planet and nearby space, the SDO helps us to better prepare for and mitigate these potential disruptions. Learn more about solar flares. Image Credit: NASA/SDO 太阳释放了一次X1太阳耀斑，这是一次强大的能量爆发，由我们的太阳动力学天文台(SDO)于2022年10月2日捕获。X级是最强烈的耀斑，而数字提供了更多关于其强度的信息。例如，X1耀斑的强度是X2耀斑强度的一半。虽然太阳耀斑会影响无线电通信、电网和导航信号，但太阳耀斑的有害辐射无法穿过地球大气层，对地面上的人类产生物理影响。通过研究耀斑以及它们如何影响我们的星球和附近的太空，SDO帮助我们更好地准备和减轻这些潜在的干扰。 了解更多关于太阳耀斑的信息。 图片来源：NASA/SDO

NASA的SpaceX Crew-5任务投射出长曝光光束

NASA的SpaceX Crew-5任务投射出长曝光光束

ByNASA中文

In this 20-second exposure from Oct. 5, 2022, a SpaceX Falcon 9 rocket carrying the company’s Crew Dragon spacecraft is launched on NASA’s SpaceX Crew-5 mission from our Kennedy Space Center in Florida to the International Space Station (ISS). This is the fifth crew rotation mission of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the ISS as part of the agency’s Commercial Crew Program. The crew successfully docked and entered the space station on Oct. 6, 2022. Aboard, the crew will conduct new scientific studies to prepare for human exploration beyond low-Earth orbit and benefit life on Earth. Image Credit: NASA/Joel Kowsky 在这张2022年10月5日20秒的照片中，NASA的SpaceX Crew-5任务从佛罗里达州肯尼迪航天中心发射到国际空间站（ISS），发射了一枚搭载该公司载人龙飞船的SpaceX猎鹰9号火箭。这是SpaceX载人龙飞船和猎鹰9号火箭第五次向国际空间站执行机组人员轮换任务，是该机构商业机组人员计划的一部分。2022年10月6日，机组人员成功对接并进入空间站。在太空中，机组人员将进行新的科学研究，为人类探索低地球轨道做好准备，造福地球上的生命。 影像来源：NASA/Joel Kowsky