保护地球，探索宇宙，发现文明
2023年4月30日 Saturn’s Moon Helene in Color Image Credit: NASA, JPL-Caltech, SSI; Processing: Daniel Macháček Explanation: Although its colors may be subtle, Saturn’s moon Helene is an enigma in any light. The moon was imaged in unprecedented detail in 2012 as the robotic Cassini spacecraft orbiting Saturn swooped to within a single Earth diameter o...
2023年4月29日 Solar Eclipse from a Ship Image Credit: Fred Espenak Explanation: Along a narrow path that mostly avoided landfall, the shadow of the New Moon raced across planet Earth’s southern hemisphere on April 20 to create a rare annular-total or hybrid solar eclipse. From the Indian Ocean off the coast of western Australia, ship-borne eclipse chasers...
A menagerie of interesting astronomical finds are visible in this image from the NASA/ESA Hubble Space Telescope. In addition to several large elliptical galaxies, a ring-shaped galaxy is lurking on the right of the image. A pair of bright stars are also visible at the left of the image, notable for their colorful crisscrossing diffraction spikes. This colle...
2023年4月28日 Runaway Star Alpha Camelopardalis Image Credit: André Vilhena Explanation: Like a ship plowing through cosmic seas, runaway star Alpha Camelopardalis has produced this graceful arcing bow wave or bow shock. The massive supergiant star moves at over 60 kilometers per second through space, compressing the interstellar material in its path. At the ce...
图为国际空间站在西班牙马略卡岛附近的地中海上空262英里处绕轨道飞行时，诺斯罗普·格鲁曼公司的天鹅座太空货运飞船从加拿大手臂2号机械臂上释放后的瞬间。
2023年4月27日 The Tarantula Nebula from SuperBIT Image Credit: SuperBIT, NASA Explanation: The Tarantula Nebula, also known as 30 Doradus, is more than a thousand light-years in diameter, a giant star forming region within nearby satellite galaxy the Large Magellanic Cloud. About 160 thousand light-years away, it’s the largest, most violent star forming r...
2023年4月26日 The Moon through the Arc de Triomphe Image Credit & Copyright: Stefano Zanarello Explanation: Was this a lucky shot? Although many amazing photographs are taken by someone who just happened to be in the right place at the right time, this image took skill and careful planning. First was the angular scale: if you shoot too close to the famous ...
2023年4月25日 Northern Lights over Southern Europe Image Credit & Copyright: Lorenzo Cordero Explanation: Did you see an aurora over the past two nights? Many people who don’t live in Earth’s far north did. Reports of aurora came in not only from northern locales in the USA as Alaska, but as far south as Texas and Arizona. A huge auroral oval e...
NASA的詹姆斯·韦伯太空望远镜已经开始揭示宇宙历史上迄今为止遥不可及的形成时期：星系的形成和聚集。天文学家称之为红移7.9的距离，即大爆炸后仅6.5亿年，首次证实了由七个星系组成的原星团。
Former NASA Administrator Charlie Bolden speaks with local students during an Earth Day event, Thursday, April 20, 2023, at Union Station in Washington. The agency’s Earth Day exhibits are a free, public part of yearly celebrations; visitors can participate in hands-on activities and learn about the many ways NASA conducts Earth science. Image Credit: NASA/K...