保护地球，探索宇宙，发现文明
2021年02月02日 A Colorful Quadrantid Meteor Image Credit & Copyright: Frank Kuszaj Explanation: Meteors can be colorful. While the human eye usually cannot discern many colors, cameras often can. Pictured is a Quadrantids meteor captured by camera over Missouri, USA, early this month that was not only impressively bright, but colorful. The radiant grit, li...
2021年01月31日 Asteroids in the Distance Image Credit: NASA, ESA, Hubble; R. Evans & K. Stapelfeldt (JPL) Explanation: Rocks from space hit Earth every day. The larger the rock, though, the less often Earth is struck. Many kilograms of space dust pitter to Earth daily. Larger bits appear initially as a bright meteor. Baseball-sized rocks and ice-balls stre...
2020年12月14日 Capsule Returns from Asteroid Ryugu Video Credit: JAXA, Hayabusa2 Explanation: The streak across the sky is a capsule returning from an asteroid. It returned earlier this month from the near-Earth asteroid 162173 Ryugu carrying small rocks and dust from its surface. The canister was released by its mothership, Japan’s Hayabusa2, a mission t...
2020年11月21日 Mars and Meteor over Jade Dragon Snow Mountain Image Credit & Copyright: Jeff Dai (TWAN) Explanation: A brilliant yellowish celestial beacon, Mars still dazzles in the night. Peering between clouds the wandering planet was briefly joined by the flash of a meteor in this moonless dark sky on November 18. The single exposure was taken as the E...
2020年8月10日 Perseids from Perseus Image Credit & Copyright: Petr Horálek Explanation: Where are all these meteors coming from? In terms of direction on the sky, the pointed answer is the constellation of Perseus. That is why the meteor shower that peaks tomorrow night is known as the Perseids — the meteors all appear to came from a radiant toward P...
2020年7月23日 Fairytale NEOWISE Image Credit & Copyright: Stephane Guisard (Los Cielos de America, TWAN) Explanation: Comet dust falls through a twilight sky in this dream-like scene, but it’s not part of a fairytale movie. Still, Castle Neuschwanstein, nestled in the Bavarian Alps, did inspire Disneyland’s Sleeping Beauty Castle. Captured on J...
2020 May 14 Comet Halley vs Comet SWAN Image Credit & Copyright: Luc Perrot (TWAN) Explanation: The pre-dawn hours of May 3rd were moonless as grains of cosmic dust streaked through southern skies above Reunion Island. Swept up as planet Earth plowed through dusty debris streams left behind periodic Comet 1/P Halley, the annual meteor shower is known as...
2019 October 10 Mid-Air Meteor and Milky Way Image Credit & Copyright: Eric Wagner Explanation: On September 24, a late evening commercial flight from Singapore to Australia offered stratospheric views of the southern hemisphere’s night sky, if you chose a window seat. In fact, a well-planned seating choice with a window facing toward the Milky Way...
在过去的一周里，发生了两起壮观的景象：巨大的火球划过了澳大利亚的上空。经过美国航空航天局（NASA）的证实，一颗“调皮的”流星与澳大利亚的海岸来了次亲密接触，最终落入了大澳大利亚湾（Great Australian Bight）的水域之中，威力与小型核弹相近。 第一起“火球事件”发生在5月20日周一的凌晨，横跨了澳大利亚的整个北领地（Northern Territory），在泰能特溪（Tennant Creek）和爱丽斯泉（Alice Springs）都能看到（这两个地方相距500多千米）。第二起发生在两天之后，划过了南澳大利亚和维多利亚州的上空。 点亮南阿德莱德医院上空的巨大火球。当火球炸裂时，小小的白绿色光猛然变成一个巨大的橙色火焰球。 来源：theconversation.com 根据NASA的近地天体研...
来自美国航空航天局（NASA）和位于马里兰州劳雷尔的约翰•霍普金斯大学（Johns Hopkins University）应用物理实验室（Applied Physics Laboratory）的研究人员声称，撞击月球的流星群（meteoroid stream）给月球大气注入了暂时性的水蒸气。 这一发现将有助于科学家探索月球上水的历史。月球上的水为未来长期月球任务，以及人类深空探索提供了维持人类活动的资源。已有多种模型证明，流星体在撞击月球时会将月球中的水释放出来，形成水蒸气，但科学家一直没有观察到相应的现象。 现在，在月球大气及尘埃环境探测器（Lunar Atmosphere and Dust Environment Explorer，LADEE）收集到的数据中，研究团队发现了数十个月球上的水释放事件。LADE...