卫星捕捉到美国西部的火情

卫星捕捉到美国西部的火情

ByNASA中文

Our Aqua satellite captured this composite visible (left) and infrared (right) image on Sep. 29, 2020, which shows that fires and smoke continue to dominate the landscape of the western U.S. The visible image shows the smoke and the infrared image shows the heat from the fires (orange points). The California Department of Forestry and Fire Protection (CAL Fire) page for Sep. 30 finds many large fires still active throughout California and the Pacific Northwest. The August Complex in California continues to be the largest wildfire still active and uncontained at 949,055 acres, located in Glenn, Lake, Mendocino, Tehama, and Trinity Counties. The August Complex is the largest wildfire in California’s history having surpassed the Mendocino Complex fire which burned 459,123 acres in July 2018….

反光镜:从阿波罗到火星

反光镜:从阿波罗到火星

ByNASA中文

When Apollo 11 landed on the Moon, the crew brought devices with them called retroreflectors, which are essentially small arrays of mirrors. The plan was for scientists on Earth to aim lasers at them and calculate the time it took for the beams to return. This provided exceptionally precise measurements of the Moon’s orbit and shape, including how it changed slightly based on Earth’s gravitational pull. Research with these Apollo-era lunar retroreflectors continues to this day. Scientists want to perform similar experiments on the Red Planet and NASA’s Perseverance rover – scheduled to land on Mars on Feb. 18, 2021 – carries with it the Laser Retroreflector Array. There’s also small one aboard the agency’s InSight lander, called Laser Retroreflector for InSight. While there is…

宇航员Serena M. Aunon-Chancellor在太空中检查自己的眼睛

宇航员Serena M. Aunon-Chancellor在太空中检查自己的眼睛

ByNASA中文

Astronaut Serena Auñón-Chancellor examines her eye with a fundoscope aboard the International Space Station with remote support from doctors on the ground. As a member of the Expedition 56/57 crew in 2018, she participated in many onboard experiments in biology, biotechnology, physical science and Earth science aboard the station Dr. Auñón-Chancellor was selected as a member of the Astronaut Corps in 2009. She is board certified in Internal and Aerospace Medicine. During her time aboard the station, the crew led investigations into new cancer treatment methods and algae growth in space. The crew also installed a new Life Sciences Glovebox, a sealed work area for life science and technology investigations that can accommodate two astronauts. During this, her first flight, she logged in 197 days…

联盟号MS-16飞船与国际空间站对接

联盟号MS-16飞船与国际空间站对接

ByNASA中文

Pictured is the Soyuz MS-16 crew ship, currently docked to the International Space Station’s Poisk module. The is the same spacecraft that launched, and will bring home, Expedition 63 Commander Chris Cassidy, Soyuz Commander Anatoly Ivanishin, and cosmonaut Ivan Vagner. Expedition 63 will depart the station and land in Kazakhstan on Oct. 21, 2020. Image Credit: NASA 图拉号是联盟号MS-16载人飞船，目前停靠在国际空间站的泊克舱。第63号远征队指挥官克里斯·卡西迪、联盟号指挥官阿纳托利·伊万尼辛和宇航员伊万·瓦格纳也将搭载这艘飞船返回地球。第63号远征队将于2020年10月21日离开空间站并在哈萨克斯坦着陆。 图片来源：NASA

哈勃望远镜看到了一个位于“黑暗面”的星系

哈勃望远镜看到了一个位于“黑暗面”的星系

ByNASA中文

Resting on the tail of the Great Bear in the constellation of Ursa Major lies NGC 5585, a spiral galaxy that is more than it appears. The many stars and clouds of dust and gas that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As in many galaxies, this discrepancy can be explained by the abundant yet seemingly invisible presence of dark matter, a mysterious material that astronomers can’t directly observe. The stellar disk of the galaxy extends over 35,000 light-years across. When compared with galaxies of a similar shape and size, NGC 5585 stands out by having a notably different composition. Contributing to the total mass of the galaxy, it…

哈勃拍摄了月球

哈勃拍摄了月球

ByNASA中文

This image from 1991 shows Earth’s Moon, with its dark basaltic mare, clearly visible in great detail. Our Moon is Earth’s only natural satellite, unlike several other planets in our solar system. For example, gas giant Jupiter has more than 70 known moons. Learn more about the Moon and participate in International Observe the Moon Night. #ObserveTheMoon Credit: Lick Observatory/ESA/Hubble 这张1991年的照片展示了地球的卫星，以及它的玄武岩海，非常清晰可见。 与我们太阳系中的其他几个行星不同，我们的月球是地球上唯一的天然卫星。 例如，天然气巨星木星有70多个已知的卫星。 了解有关月球的更多信息，并参加国际观测月球之夜。 #ObserveTheMoon 来源： Lick Observatory/ESA/Hubble

NASA正在注视着宇宙

NASA正在注视着宇宙

ByNASA中文

Humanity has “eyes” that can detect all different types of light through telescopes around the globe and a fleet of observatories in space. From radio waves to gamma rays, this “multiwavelength” approach to astronomy is crucial to getting a complete understanding of objects in space. This image is of galaxy cluster Abell 2744. Galaxy clusters are the largest objects in the universe held together by gravity. They contain enormous amounts of superheated gas, with temperatures of tens of millions of degrees, which glows brightly in X-rays, and can be observed across millions of light years between the galaxies. This image combines X-rays from the Chandra X-Ray Observatory (diffuse blue emission) with optical light data from the Hubble Space Telescope (red, green, and blue). See a…

木星北极的彩色旋风

木星北极的彩色旋风

ByNASA中文

Cyclones at the north pole of Jupiter appear as swirls of striking colors in this extreme false color rendering of an image from NASA’s Juno mission. The huge, persistent cyclone found at Jupiter’s north pole is visible at the center of the image, encircled by smaller cyclones that range in size from 2,500 to 2,900 miles (4,000 to 4,600 kilometers). Together, this pattern of storms covers an area that would dwarf the Earth. The color choices in this image reveal both the beauty of Jupiter and the subtle details present in Jupiter’s dynamic cloud structure. Each new observation that Juno provides of Jupiter’s atmosphere complements computer simulations and helps further refine our understanding of how the storms evolve over time. The Juno mission provided the…

艾伦·奥乔亚（Ellen Ochoa）与第一个前往空间站的人形机器人握手

艾伦·奥乔亚（Ellen Ochoa）与第一个前往空间站的人形机器人握手

ByNASA中文

Then-NASA Johnson Space Center deputy director Ellen Ochoa poses for a photo with Robonaut 2 (R2) during media day in the Space Vehicle Mock-up Facility on Aug. 4, 2010. R2 hitched a ride to the International Space Station with the STS-133. It was the first humanoid robot to travel to space and the first U.S.-built robot to visit the station. R2 will stay on the space station indefinitely to allow engineers on the ground to learn more about how humanoid robots fare in microgravity. Ochoa became Johnson Center director in 2012 and retired from that position in 2018. She is veteran of four space shuttle flights and holds a doctorate in electrical engineering from Stanford. #HispanicHeritageMonth Image Credit: NASA 2010年8月4日，美国宇航局约翰逊航天中心副主任埃伦·奥乔亚（Ellen Ochoa）在太空飞行器模拟设施的媒体日与Robonaut 2（R2）合影。R2搭乘了STS-133前往国际空间站。它是第一个到太空旅行的人形机器人，也是第一个访问空间站的美国制造的机器人。R2将无限期地留在空间站，让地面上的工程师了解更多关于类人机器人在微重力下如何生存的信息。 奥乔亚（Ochoa）于2012年成为约翰逊中心主任，并于2018年从该职位退休。她是四次航天飞机飞行的资深人士，并拥有斯坦福大学的电气工程博士学位。 #HispanicHeritageMonth 图片来源：NASA

木星上的月影

木星上的月影

ByNASA中文

Jupiter’s volcanically active moon Io casts its shadow on the planet in this dramatic image from NASA’s Juno spacecraft. As with solar eclipses on the Earth, within the dark circle racing across Jupiter’s cloud tops one would witness a full solar eclipse as Io passes in front of the Sun. Such events occur frequently on Jupiter because it is a large planet with many moons. In addition, unlike most other planets in our solar system, Jupiter’s axis is not highly tilted relative to its orbit, so the Sun never strays far from Jupiter’s equatorial plane (+/- 3 degrees). This means Jupiter’s moons regularly cast their shadows on the planet throughout its year. Juno’s close proximity to Jupiter provides an exceptional fish-eye view, showing a small…