月亮与木星、土星相遇

月亮与木星、土星相遇

ByNASA中文

The Moon, left, Saturn, upper right, and Jupiter, lower right, are seen after sunset from Washington, DC, on Dec. 17, 2020. The two planets drew closer to each other in the sky as they headed towards a “great conjunction” on Dec. 21, where the two giant planets appeared a tenth of a degree apart. View and download the full image here. See skywatching highlights, including meteor, asteroid, and planet sightings in What’s Up for Dec. 2023. Image Credit: NASA/Aubrey Gemignani 2020年12月17日，在华盛顿特区日落后看到的月球（左）、土星（右上）和木星（右下）。这两颗行星在12月21日走向大近和时，在天空中彼此靠近，两颗巨行星相距十分之一度。在这里查看和下载完整的图像。 请参阅2023年12月的观星指南，包括流星、小行星和行星的观测。 影像来源：NASA/Aubrey Gemignani

高能粒子撞击地球

高能粒子撞击地球

ByNASA中文

2023年12月5日 Energetic Particle Strikes the Earth Illustration Credit: Osaka Metropolitan U./L-INSIGHT, Kyoto U./Ryuunosuke Takeshige Explanation: It was one of the most energetic particles ever known to strike the Earth — but where did it come from? Dubbed Amaterasu after the Shinto sun goddess, this particle, as do all cosmic rays that strike the Earth’s atmosphere, caused an air shower of electrons, protons, and other elementary particles to spray down onto the Earth below. In the featured illustration, a cosmic ray air shower is pictured striking the Telescope Array in Utah, USA, which recorded the Amaterasu event in 2021 May. Cosmic ray air showers are common enough that you likely have been in a particle spray yourself, although you likely wouldn’t have noticed. The origin of…

先锋10号穿越小行星带

先锋10号穿越小行星带

ByNASA中文

If spacecraft are to visit the outer solar system, they must cross the asteroid belt between Mars and Jupiter. The Pioneer mission was faced with the question of just how dangerous this asteroid belt would be to a spacecraft passing through it. Image Credit: NASA This illustration made on Nov. 26, 1974, by Rick Giudice shows the Pioneer 10 spacecraft traveling through the asteroid belt between Mars and Jupiter, the largest planet in the solar system. At the time, it was uncertain whether it would traverse it safely since the density of particles large enough to damage the craft was not yet known, but Pioneer 10 became the first satellite to enter and pass through the asteroid belt. The mission’s primary goal was to explore…

飞机凌越新月

飞机凌越新月

ByNASA中文

2023年12月4日 Plane Crossing Crescent Moon Image Credit & Copyright: Juned Patel Explanation: No, the Moon is not a bow, and no, it did not shoot out a plane like an arrow. What is pictured is a chance superposition. The plane’s contrail would normally appear white, but the large volume of air toward the rising Sun preferentially knocked away blue light, not only making the sky blue, but giving the reflected trail a bright red hue. Far in the distance, well behind the plane, the crescent Moon also appears slightly reddened. Captured early last month from Bolton, UK, the featured image was taken so soon after sunrise that the plane was sunlit from below, as was its contrail. Within minutes, unfortunately, the impromptu sky show ended….

NASA研究飞行员大卫·赞恩

NASA研究飞行员大卫·赞恩

ByNASA中文

“I want to help the Native community get better representation and show that we can help Native citizens get into aerospace engineering, mathematics, or [other STEM career fields]. And the Cherokee and Choctaw Nations are trying to do the same thing on their reservations. They have amazing education networks, so when I realized what they were doing, I wanted to help them be successful [in their efforts] so that they could inspire other tribes to do the same thing. “When I was talking with the Principal Chiefs of the Cherokee and Choctaw Nations, they said, ‘We need to start making decisions for our people seven generations from now.’ So, they started looking at emerging technologies, and aviation [with a focus on] advanced air mobility was…

月落泰德火山

月落泰德火山

ByNASA中文

2023年12月3日 Moon Setting Behind Teide Volcano Video Credit & Copyright: Daniel López (El Cielo de Canarias); Music: Piano della Moon (Dan Silva) Explanation: These people are not in danger. What is coming down from the left is just the Moon, far in the distance. Luna appears so large here because she is being photographed through a telescopic lens. What is moving is mostly the Earth, whose spin causes the Moon to slowly disappear behind Mount Teide, a volcano in the Canary Islands off the northwest coast of Africa. The people pictured are 16 kilometers away and many are facing the camera because they are watching the Sun rise behind the photographer. It is not a coincidence that a full moon rises just when the Sun…

北京古观象台上空的星轨

北京古观象台上空的星轨

ByNASA中文

2023年12月2日 Startrails over Beijing Ancient Observatory Image Credit & Copyright: Jeff Dai (TWAN) Explanation: You can take a subway ride to visit this observatory in Beijing, China but you won’t find any telescopes there. Starting in the 1400s astronomers erected devices at the Beijing Ancient Observatory site to enable them to accurately measure and track the positions of naked-eye stars and planets. Some of the large, ornate astronomical instruments are still standing. You can even see stars from the star observation platform today, but now only the very brightest celestial beacons are visible against the city lights. In this time series of exposures from a camera fixed to a tripod to record graceful arcing startrails, the brightest trail is actually the Moon. Its broad arc…

银河升起

银河升起

ByNASA中文

2023年12月1日 Milky Way Rising Image Credit & Copyright: José Rodrigues Explanation: The core of the Milky Way is rising beyond the Chilean mountain-top La Silla Observatory in this deep night skyscape. Seen toward the constellation Sagittarius, our home galaxy’s center is flanked on the left, by the European Southern Observatory’s New Technology Telescope which pioneered the use of active optics to accurately control the shape of large telescope mirrors. To the right stands the ESO 3.6-meter Telescope, home of the exoplanet hunting HARPS and NIRPS spectrographs. Between them, the galaxy’s central bulge is filled with obscuring clouds of interstellar dust, bright stars, clusters, and nebulae. Prominent reddish hydrogen emission from the star-forming Lagoon Nebula, M8, is near center. The Trifid Nebula, M20, combines blue light…

阿尔忒弥斯1号：任务的第13天

阿尔忒弥斯1号：任务的第13天

ByNASA中文

2023年11月30日 Artemis 1: Flight Day 13 Image Credit: NASA, Artemis I Explanation: On flight day 13 (November 28, 2022) of the Artemis I mission, the Orion spacecraft reached its maximum distance from its home world. Over 430,000 kilometers from Earth in a distant retrograde orbit, Orion surpassed the record for most distant spacecraft designed to carry humans. That record was previously set in 1970 during the Apollo 13 mission to the Moon. Both Earth and Moon are in the same field of view in this video frame from Orion on Artemis I mission flight day 13. The planet and its large natural satellite even appear about the same apparent size from the uncrewed spacecraft’s perspective. Tomorrow’s picture: galaxy rise 阿尔忒弥斯1号：任务的第13天 影像提供: NASA, Artemis I 说明:…