保护地球，探索宇宙，发现文明
The International Space Station was orbiting 263 miles above the southeast coast of Brazil on the Atlantic Ocean into an orbital sunrise when this photograph was taken. The orbital platform has been continuously occupied for more than 20 years and hosts a variety of research and experiments that benefit the whole of humanity. Image Credit: NASA 这张照片拍摄时，国际空间站...
Gene Roddenberry would have been 100 years old on Aug. 19, 2021, and we at NASA celebrate his legacy. As creator of the legendary Star Trek saga, Roddenberry’s vision continues to resonate. In the documentary “NASA on the Edge of Forever: Science in Space,” host NASA astronaut Victor Glover stated, “Science and Star Trek go hand-in-hand.” The film expl...
2021年8月24日 PDS 70: Disk, Planets, and Moons Image Credit: VLT/MUSE (ESO); M. Benisty et al. Explanation: It’s not the big disk that’s attracting the most attention. Although the big planet-forming disk around the star PDS 70 is clearly imaged and itself quite interesting. It’s also not the planet on the right, just inside the big disk, that...
2021年8月23日 Abell 3827: Cannibal Cluster Gravitational Lens Image Credit: ESA/Hubble & NASA, R. Massey Explanation: Is that one galaxy or three? Toward the right of the featured Hubble image of the massive galaxy cluster Abell 3827 is what appears to be a most unusual galaxy — curved and with three centers. A detailed analysis, however, finds that ...
2021年8月22日 Explosions from White Dwarf Star RS Oph Illustration Credit & Copyright: David A. Hardy & PPARC Explanation: Spectacular explosions keep occurring in the binary star system named RS Ophiuchi. Every 20 years or so, the red giant star dumps enough hydrogen gas onto its companion white dwarf star to set off a brilliant thermonuclear explosi...
2021年8月21日 Triple Transit and Mutual Events Image Credit & Copyright: Christopher Go Explanation: These three panels feature the Solar System’s ruling gas giant Jupiter on August 15 as seen from Cebu City, Philippines, planet Earth. On that date the well-timed telescopic views detail some remarkable performances, transits and mutual events, by Jup...
2021年8月20日 Three Perseid Nights Image Credit & Copyright: Balint Lengyel Explanation: Frames from a camera that spent three moonless nights under the stars create this composite night skyscape. They were recorded during August 11-13 while planet Earth was sweeping through the dusty trail of comet Swift-Tuttle. One long exposure, untracked for the foregr...
2021年8月19日 Bright Meteor, Starry Sky Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva) Explanation: Plowing through Earth’s atmosphere at 60 kilometers per second, this bright perseid meteor streaks along a starry Milky Way. Captured in dark Portugal skies on August 12, it moves right to left through the frame. Its colorful trail sta...
Galaxies and dark matter go together like peanut butter and jelly. Rarely is one without the other, but a recently discovered galaxy called NGC 1052-DF2 is nearly entirely lacking in dark matter. In November 2019, researchers were astonished when they viewed its image captured by the Hubble Space Telescope. Dark matter is an invisible substance that astronom...
In this image, a NASA Black Brant XII suborbital sounding rocket was launched at 8:44 p.m. EDT, Sunday, May 16, 2021, from the Wallops Flight Facility. The four stage rocket carried the KiNETic-scale energy and momentum transport eXperiment, or KiNet-X, designed to study a very fundamental problem in space plasmas, namely, how are energy and momentum transpo...