露齿葫芦装点银河

露齿葫芦装点银河

ByNASA中文

While observing the outer region of the Milky Way galaxy, our Spitzer Telescope captured this infrared image of a cloud of gas and dust that looks like the hollowed-out pumpkins we see every Halloween. Nicknamed the “Jack-o’-Lantern Nebula,” it was likely created by powerful outflows of radiation and particles from a massive O-type star, about 15 to 20 times heavier than the Sun. The data used to create this image was collected during Spitzer’s “cold mission,” which ran between 2004 and 2009. Image Credit: NASA/JPL-Caltech 在观测银河系外部区域时，NASA的斯皮策望远镜捕捉到了这张由气体和尘埃组成的云团的红外图像，它看起来就像我们每年万圣节都会看到的掏空的南瓜。它被称为“南瓜灯星云”，很可能是由一颗质量约为太阳15到20倍的大质量O型恒星的强大辐射和粒子外流形成。 用于创建这张图像的数据是在2004年至2009年斯皮策的“冷任务”期间收集。 影像来源：NASA/JPL-Caltech

露西发现了地球和月球

露西发现了地球和月球

ByNASA中文

On Oct. 13, 2022, NASA’s Lucy spacecraft captured this image of the Earth and the Moon from 890,000 miles (1.4 million km) away. The image was taken as part of an instrument calibration sequence as the spacecraft approached Earth for its first of three Earth gravity assists. These Earth flybys provide Lucy with the speed required to reach the Trojan asteroids — small bodies that orbit the Sun at the same distance as Jupiter. On its 12-year journey, Lucy will fly by a record-breaking number of asteroids and survey their diversity, looking for clues to better understand the formation of the solar system. The image was taken with Lucy’s Terminal Tracking Camera (T2CAM) system, a pair of identical cameras that are responsible for tracking the…

绘制整个夜空

绘制整个夜空

ByNASA中文

This mosaic is composed of images covering the entire sky, taken by the Wide-field Infrared Survey Explorer (WISE) as part of WISE’s 2012 All-Sky Data Release. By observing the entire sky, WISE could search for faint objects, like distant galaxies, or survey groups of cosmic objects. Not visible to the human eye, infrared light is radiated by a plethora of cosmic objects, including cool, nearby stars and some of the most luminous galaxies in the universe. The WISE mission ended in 2011 after the onboard coolant – needed for some infrared observations – ran out, but the spacecraft and some of its infrared detectors were still functional. So, in 2013, NASA repurposed it to track asteroids and other near-Earth objects, or NEOs. Both the mission…

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