保护地球，探索宇宙，发现文明
When it comes time for NASA’s Psyche spacecraft to power itself through deep space, it’ll be more brain than brawn that does the work. Once the stuff of science fiction, the efficient and quiet power of electric propulsion will provide the force that propels the Psyche spacecraft all the way to the main asteroid belt between Mars and Jupiter. The orbiter’s t...
Harold Domich. Robert Greenmun. Barron Gulak. Raymond Harper. Jerald Jordan. Harry Larson. David Myers. Donald Peterson. Raymond Piper. Alvin Steele. John Zakutney. 哈罗德·多米奇。罗伯特·格林蒙。巴伦·古拉克。雷蒙德·哈珀。杰拉德·乔丹。哈里·拉尔森。大卫迈尔斯。唐纳德·彼得森。雷蒙德派珀。阿尔文·斯蒂尔。约翰·扎库特尼。 Before NASA could send humans to space, the agency needed to better understand the effects of prolonged weightless...
Lee esta historia en español aquí. 在这里阅读西班牙文版的故事。 Pedro Cota is a video producer for NASA en español (NASA’s Spanish communications program), working for the agency’s Science Mission Directorate. Cota, who joined NASA in August 2020 during the COVID-19 pandemic and working remotely, produces video content in Spanish that focuses on the scientific missi...
2021年10月7日 NGC 6559: East of the Lagoon Image Credit & Copyright: Roberto Sartori Explanation: Slide your telescope just east of the Lagoon Nebula to find this alluring field of view in the rich starfields of the constellation Sagittarius toward the central Milky Way. Of course the Lagoon nebula is also known as M8, the eighth object listed in Charles M...
2021年10月6日 M43: Streams of Orion Image Credit & Copyright: Jari Saukkonen Explanation: Where do the dark streams of dust in the Orion Nebula originate? This part of the Orion Molecular Cloud Complex, M43, is the often imaged but rarely mentioned neighbor of the more famous M42. M42, seen in part to the upper right, includes many bright stars from the Tr...
2021年10月5日 Sunrise at the South Pole Image Credit & Copyright: Martin Wolf (U. Wisconsin), IceCube Neutrino Obs., NSF; ht: Alice Allen Explanation: Sunrise at the South Pole is different. Usually a welcome sight, it follows months of darkness — and begins months of sunshine. At Earth’s poles, it can take weeks for the Sun to rise, in contras...
2021年10月4日 NGC 4676: When Mice Collide Image Credit: NASA, ESA, Hubble; Processing & Copyright: William Ostling (The Astronomy Enthusiast) Explanation: These two mighty galaxies are pulling each other apart. Known as the “Mice” because they have such long tails, each spiral galaxy has likely already passed through the other. The long tails a...
2021年10月3日 The Holographic Principle and a Teapot Image Credit: Caltech Explanation: Sure, you can see the 2D rectangle of colors, but can you see deeper? Counting color patches in the featured image, you might estimate that the most information that this 2D digital image can hold is about 60 (horizontal) x 50(vertical) x 256 (possible colors) = 768,000 bits...
2021年10月2日 A Light and Dusty Night Image Credit & Copyright: Rodrigo Guerra Explanation: Posing as a brilliant evening star, Venus lies near the western horizon in this southern hemisphere, early spring, night skyscape. To create the composite view exposures tracking the sky and fixed for the foreground were taken on September 25 from Cascavel in southe...
影像来源：NASA/JPL-Caltech 翻译：灼眼的粉丝 十月份的天空会发生什么？ 看这个月的日出日落，以及两颗争夺“极点”位置的璀璨星星。 10月10日，在西南方向寻找五天大的新月与金星和明亮的橙色心宿二会合，然后观察金星接近心宿二，在15日和16日会有一次紧密的合相，这两颗星之间的距离只有1.5°。 10月15日和16日，太阳落山后大约一个小时，金星与明亮的橘黄色心宿二的距离在1.5°以内。 影像来源：NASA/JPL-Caltech 在十月的最后一周，早起的人会短暂地看到水星。 在日出前30-45分钟，在东方地平线上方约10度处或手臂距离的拳头同宽处你可以看到水星。 在十月的最后一周，太阳升起前，人们可以在东方地平线上清晰地看到水星。 影像来源：NASA/JPL-Caltech 然后在10月30日，黎...