保护地球，探索宇宙，发现文明
2023年4月24日 The Medulla Nebula Supernova Remnant Image Credit & Copyright: Kimberly Sibbald Explanation: What powers this unusual nebula? CTB-1 is the expanding gas shell that was left when a massive star toward the constellation of Cassiopeia exploded about 10,000 years ago. The star likely detonated when it ran out of elements near its core that could ...
2023年4月23日 A Waterspout in Florida Image Credit & Copyright: Joey Mole Explanation: What’s happening over the water? Pictured here is one of the better images yet recorded of a waterspout, a type of tornado that occurs over water. Waterspouts are spinning columns of rising moist air that typically form over warm water. Waterspouts can be as danger...
天文学家已经确定，超新星爆炸对行星及其大气构成了另一种威胁。这一结果来自于NASA钱德拉X射线天文台和其他望远镜对30多颗超新星进行的X射线观测分析。
2023年4月22日 NGC 1333: Stellar Nursery in Perseus Image Credit: Science – NASA, ESA, STScI, Processing – Varun Bajaj (STScI), Joseph DePasquale (STScI), Jennifer Mack (STScI) Explanation: In visible light NGC 1333 is seen as a reflection nebula, dominated by bluish hues characteristic of starlight reflected by interstellar dust. A mere 1,000 light-...
2023年4月21日 Solar Eclipse from Western Australia Image Credit & Copyright: Gwenaël Blanck 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. A mere 62 seconds of totality could be seen though, wh...
天文学家正在庆祝NASA的哈勃太空望远镜发射33周年，并拍摄了一张附近恒星形成区域NGC 1333的空灵照片。该星云位于英仙座分子云中，距离地球约960光年。
This view of the Antennae Galaxies, two large galaxies colliding 60 million light-years away, is one of the first research images from the Super Pressure Balloon Imaging Telescope (SuperBIT) that launched on a scientific super pressure balloon April 16, 2023 (local time New Zealand). This image and one of the Tarantula Nebula were captured as the balloon-bor...
2023年4月20日 The Dark Seahorse in Cepheus Image Credit & Copyright: Jeff Herman Explanation: Spanning light-years, this suggestive shape known as the Seahorse Nebula appears in silhouette against a rich, luminous background of stars. Seen toward the royal northern constellation of Cepheus, the dusty, obscuring clouds are part of a Milky Way molecular clou...
This April 16, 2023, enhanced color image of NASA’s Ingenuity Mars Helicopter is the clearest view of the rotorcraft since its first flight. Ingenuity completed its 50th flight on April 13, 2023; the helicopter’s first flight on Mars was two years ago on April 19, 2021. This picture was taken by the Mastcam-Z instrument aboard the Perseverance ro...
2023年4月19日 Auroral Storm over Lapland Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN) Explanation: On some nights the sky is the best show in town. On this night, auroras ruled the sky, and the geomagnetic storm that created this colorful sky show originated from an increasingly active Sun. Surprisingly, since the approaching solar CME...