保护地球，探索宇宙，发现文明
2022年4月28日 Lyrid of the Lake Image Credit & Copyright: Jeff Dai (TWAN) Explanation: In the early hours of April 24 this bright Lyrid meteor flashed along the central Milky Way. For a moment, it cast a bright reflection across Lake Nian, Yunnan province, China. The annual Lyrid meteor shower, one of the oldest known, is active in late April, as our fair ...
2021年12月20日 The Comet and the Fireball Image Credit & Copyright: Cory Poole Explanation: This picture was supposed to feature a comet. Specifically, a series of images of the brightest comet of 2021 were being captured: Comet Leonard. But the universe had other plans. Within a fraction of a second, a meteor so bright it could be called a fireball streak...
2021年12月17日 Geminid of the North Image Credit & Copyright: Alvin Wu Explanation: An arid expanse of the Tengger Desert in north-central China, planet Earth fills the foreground of this starry scene. A widefield panoramic view, it was recorded shortly after moonset in the local predawn hours of December 14. Pictured in the still dark sky, stars of the no...
2021年10月12日 Fireball over Lake Louise Image Credit & Copyright: Hao Qin Explanation: What makes a meteor a fireball? First of all, everyone agrees that a fireball is an exceptionally bright meteor. Past that, the International Astronomical Union defines a fireball as a meteor brighter than apparent magnitude -4, which corresponds (roughly) to being brig...
2021年03月15日 Meteor Fireballs in Light and Sound Image Credit & Copyright: Thomas Ashcraft (Radio Fireball Observatory) Explanation: Yes, but have you ever heard a meteor? Usually, meteors are too far away to make any audible sound. However, a meteor will briefly create an ionization trail that can reflect a distant radio signal. If the geometry is right...
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...