2020年12月20日 A Volcanic Great Conjunction Image Credit & Copyright: Francisco Sojuel Explanation: Where can I see the Great Conjunction? Near where the Sun just set. Directionally, this close passing of Jupiter and Saturn will be toward the southwest. Since the planetary pair, the Sun, and the E […]
2020年12月19日 Conjunction after Sunset Image Credit & Copyright: Alireza Vafa Explanation: How close will Jupiter and Saturn be at their Great Conjunction? Consider this beautiful triple conjunction of Moon, Jupiter and Saturn captured through clouds in the wintry twilight. The telephoto view loo
2020年12月13日星期日，在弗吉尼亚州卢雷，雪兰多国家公园日落后拍摄的土星(上方)和木星(下方)。两颗行星在12月21日朝着大近合前进时，彼此之间的距离越来越近，这两个巨行星之间的距离将相差十分之一度。 来源：NASA / Bill Ingalls 天文爱好者迎来了年终盛宴。俗称“圣诞节之星”的是一颗特别活跃的行星结，在接下来的两周里，当明亮的木星和土星近合在12月21日晚上达到顶峰时，很容易在傍晚的天空中看到它们。 1610年，意大利天文学家伽利略·伽利莱（Galileo Galilei）将望远镜对准夜空，发现了木星的四个卫星——木卫一、木卫二、木卫三和木卫四。同一年，伽利略还在土星周围
2020年12月15日 Great Conjunction: Saturn and Jupiter Converge Illustration Credit & Copyright: Sebastian Voltmer Explanation: It’s happening. Saturn and Jupiter are moving closer and will soon appear in almost exactly the same direction. Coincidentally, on the night of the December solstice &
2020年12月12日 Saturn and Jupiter in Summer 2020 Image Credit & Copyright: Tunc Tezel (TWAN), Onur Durma Explanation: During this northern summer Saturn and Jupiter were both near opposition, opposite the Sun in planet Earth’s sky. Their paired retrograde motion, seen about every 20 years, i
2020年12月08日 Great Conjunction over Sicilian Lighthouse Image Credit & Copyright: Kevin Saragozza Explanation: Don’t miss the coming great conjunction. In just under two weeks, the two largest planets in our Solar System will angularly pass so close together in Earth’s sky that the Moon wo
上图为木星的卫星木卫二的艺术概念图，显示了在木卫二背向太阳的“夜侧面”，它冰冷的表面也会发光。辉光的变化和辉光本身的颜色可以揭示木卫二表面冰成分的相关信息。 图片来源：NASA / 加州理工-喷气推进实验室 新的实验在实验室中再现了木卫二（Europa）的环境，发现即使在背向太阳的“夜侧面”（nightside），这颗冰冷的卫星也闪耀着光辉，这一景象带给我们的，将远不只是炫酷的视觉效果。 天寒地冻、海洋遍布的木卫二默默地围绕木星运行，承受着辐射没完没了的无情冲击。木星用电子和其他粒子没日没夜地轰击木卫二表面，让它身处高能辐射的炼狱。然而，在这些粒子对木卫二拳打脚踢的同时，它们可能也导致了一些超
2020年11月23日 A Jupiter Vista from Juno Image Credit: NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin M. Gill; Explanation: Why do colorful cloud bands encircle Jupiter? Jupiter’s top atmospheric layer is divided into light zones and dark belts that go all the way around the giant p
This illustration shows the lightning phenomenon known as a sprite and what a sprite could look like in Jupiter’s atmosphere. Named after a mischievous, quick-witted character in English folklore, sprites last for only a few milliseconds. They feature a central blob of light with long tendrils
2020年10月20日 Saturn and Jupiter over Italian Peaks Image Credit & Copyright: Giorgia Hofer Explanation: Saturn and Jupiter are getting closer. Every night that you go out and check for the next two months, these two bright planets will be even closer together on the sky. Finally, in mid-December
