保护地球，探索宇宙，发现文明
2023年3月12日 Saturn’s Hyperion: A Moon with Odd Craters Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team Explanation: What lies at the bottom of Hyperion’s strange craters? To help find out, the robot Cassini spacecraft that once orbited Saturn swooped past the sponge-textured moon and took images of unprecedented detail. A six-image mosaic ...
影像来源：NASA/JPL 在一张名为“陨石坑农场”的麦哲伦图片中，我们看到了火山活动和撞击坑的奇特分层。 这张金星表面的三维透视图显示了三个撞击坑。图像的中心位于拉维尼亚平原西北部，大约南纬27度，东经339度。 科学家/工程师对这张图片的看法： “我记得当我第一次看到麦哲伦任务初期的新闻稿图片时，该地区被非正式地称为’陨石坑农场’。我可以从那张照片中看到金星有一些很奇怪的地方。即使这张照片是90年代初拍摄，但是现在看起来还是很奇怪。陨石坑农场的图像显示了这些看起来非常原始的陨石坑，它们叠加在火山背景上，完全没有覆盖到陨石坑的边缘。 至少在这张照片中，当金星被陨石坑覆盖时，所有这些发光的火山活动不知何故停止了。当然，这不应该是一个合理的行星历史；火山活动应该停止，陨石坑应该继续存在——...
2022年7月16日 Tycho and Clavius at Dawn Image Credit & Copyright: Eduardo Schaberger Poupeau Explanation: South is up in this dramatic telescopic view of the lunar terminator and the Moon’s rugged southern highlands. The lunar landscape was captured on July 7 with the moon at its first quarter phase. The Sun shines at a low angle from the right as da...
2022年7月3日 Phobos: Doomed Moon of Mars Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA Explanation: This moon is doomed. Mars, the red planet named for the Roman god of war, has two tiny moons, Phobos and Deimos, whose names are derived from the Greek for Fear and Panic. These martian moons may well be captured asteroids originating in the main asteroid bel...
2022年6月28日 Mercury from Passing BepiColombo Image Credit & License: ESA, JAXA, BepiColombo, MTM Explanation: Which part of the Moon is this? No part — because this is the planet Mercury. Mercury’s old surface is heavily cratered like that of Earth’s Moon. Mercury, while only slightly larger than Luna, is much denser and more massive th...
2021年8月5日 Tycho and Clavius Image Credit & Copyright: Eduardo Schaberger Poupeau Explanation: South is up in this detailed telescopic view across the Moon’s rugged southern highlands. Captured on July 20, the lunar landscape features the Moon’s young and old, the large craters Tycho and Clavius. About 100 million years young, Tycho is the sh...
2020年12月11日 Messier Craters in Stereo Image Credit: Apollo 11, NASA; Stereo Image Copyright Patrick Vantuyne Explanation: Many bright nebulae and star clusters in planet Earth’s sky are associated with the name of astronomer Charles Messier from his famous 18th century catalog. His name is also given to these two large and remarkable craters on the Moo...
Credit: NASA/JPL-Caltech/ASU 这张俯视图由轨道上拍摄的NASA图片制成，蓝色圆圈表示的是火星车将要着陆的区域，图片中心的弧形山丘高约1600英尺，是杰泽罗陨石坑（Jezero Crater）的边缘部分。 Credit：NASA JPL 火星2020（Mars 2020）的任务目标是了解火星上是否曾经存在过生命。如今的火星表面太冷也太干燥，生命无法生存，但在数十亿年前杰泽罗陨石坑形成之后，它就注满了水，形成了一个与太浩湖（Lake Tahoe）差不多大小的深湖。随着火星的气候变化，杰泽罗湖最终完全干涸，火星表面的水也消失了。 古老的湖泊是我们寻找可能火星生命的理想之地，在地球上，湖泊里满载着鲜活的生命，通常而言，生命存在的证据留藏在沉积于湖底的泥沙中。正因如此，我们用火星车上的仪器对古...