保护地球，探索宇宙，发现文明
2021年9月19日 Rings and Seasons of Saturn Image Credit & Copyright: Damian Peach/SEN Explanation: On Saturn, the rings tell you the season. On Earth, Wednesday marks an equinox, the time when the Earth’s equator tilts directly toward the Sun. Since Saturn’s grand rings orbit along the planet’s equator, these rings appear most prominent &#...
2021年9月11日 Saturn at Night Image Credit: NASA, JPL-Caltech, Space Science Institute, Mindaugas Macijauskas Explanation: Still bright in planet Earth’s night skies, good telescopic views of Saturn and its beautiful rings often make it a star at star parties. But this stunning view of Saturn’s rings and night side just isn’t possible from tel...
2021年7月30日 Mimas in Saturnlight Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Peering from the shadows, the Saturn-facing hemisphere of Mimas lies in near darkness alongside a dramatic sunlit crescent. The mosaic was captured near the Cassini spacecraft’s final close approach on January 30, 2017. Cassini’s camera was pointe...
This artist’s illustration shows the Cassini spacecraft in orbit around Saturn. Cassini made 22 orbits that swooped between the rings and the planet before ending its 13-year tour of the ringed planet on Sept. 15, 2017, with a final plunge into Saturn. Cassini spacecraft shared the wonders of Saturn and its family of icy moons—taking us to astounding w...
2021年7月13日 Saturn’s Iapetus: Painted Moon in 3D Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team; 3D Rendering: NASA’s VTAD Explanation: What has happened to Saturn’s moon Iapetus? Vast sections of this strange world are dark brown, while others are as bright white. The composition of the dark material is unknown, but infrared spectr...
2021年07月06日 Saturn and Six Moons Image Credit & Copyright: Mohammad Ranjbaran; MR Thanks: Amir Ehteshami Explanation: How many moons does Saturn have? So far 82 have been confirmed, the smallest being only a fraction of a kilometer across. Six of its largest satellites can be seen here in a composite image with 13 short exposure of the bright planet, an...
2021年06月27日 The Dancing Auroras of Saturn Image Credit: NASA, Cassini, VIMS Team, U. Arizona, U. Leicester, JPL, ASI Explanation: What drives auroras on Saturn? To help find out, scientists have sorted through hundreds of infrared images of Saturn taken by the Cassini spacecraft for other purposes, trying to find enough aurora images to correlate changes and...
影像来源：NASA/JPL-Caltech 翻译：灼眼的粉丝 6月份的天空会发生什么！ 一个日偏食，天蝎座的刺钩，还有属于6月的朱诺号。 6月10日的日食主要在美国东北部和加拿大以及欧洲西北部可见。加拿大东部的一小块区域将见到日环食。 影像来源：NASA/JPL-Caltech 继上个月的月全食之后，六月的日偏食又来了。6月10日，月球将短暂地滑落在地球和太阳之间，部分遮挡我们的太阳。 5月的月食在太平洋一带观赏效果最佳，而本月的日食对美国东北部、加拿大东部和欧洲北部的观众来说将是一种享受。对于美国观众来说，这是一个日出事件，当太阳升起时，月亮似乎已经咬了太阳一口。所以你要找一个朝向东方地平线的清晰视野来观看日偏食。对那些在北方和东方更远地方的人来说，你会看到更多被月亮遮挡的太阳。于欧洲北部的人来说，这更像是一...
2021年05月31日 Mimas: Small Moon with a Big Crater Image Credit & Copyright: NASA, JPL-Caltech, Space Science Institute, Cassini Explanation: Whatever hit Mimas nearly destroyed it. What remains is one of the largest impact craters on one of Saturn’s smallest round moons. Analysis indicates that a slightly larger impact would have destroyed Mimas ent...
影像来源：NASA/JPL-Caltech 从5月中旬开始，如果你能找到一个朝向西方地平线的清晰视野，你将有机会在同一时间亲眼看到我们太阳系的所有四颗岩质内行星。 从5月中旬开始，在日落之后看到所有四颗内行星（包括地球！）。 影像来源：NASA/JPL-Caltech 大约从5月14日开始，在当地时间日落后约半小时，将你的目光投向西方，看看你是否能发现水星、金星和火星。（当然，地球也很难错过）。 要看清地平线附近的景象，你需要一个没有附近树木和建筑物的无遮挡的视野。最好的地方是湖岸、海滩，开阔的平原、高山或高楼。 除了行星之外，从14日左右到17日，新月也会加入这个可爱的行星场景的行列。金星在天空中的高度会非常低。但现在，请利用这个机会，在一个视野中观测所有的内行星。 月食期间，月球的颜色通常呈现出红色，因为阳...