圣布拉斯角上空的火球
(原标题: Fireball over Cape San Blas)
2025-07-23
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你见过火球吗？在天文学中，火球是一种非常明亮的流星——至少和金星一样亮，甚至可能比满月还亮。火球是罕见的——如果你看到一个，你可能会记住你的一生。从物理上讲，火球是一种来自小行星或彗星的小岩石，当它穿过地球大气层时，通常会留下由气体和尘埃组成的逐渐褪色的烟雾。不太可能发生任何一次大规模的地面撞击——大部分岩石可能在分解成许多小碎片时蒸发了。这张特色照片是上周在美国佛罗里达州圣布拉斯角的一个枯木海滩上拍摄的。拼凑起来：当天的天文学难题
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Have you ever seen a fireball? In astronomy, a fireball is a very bright meteor -- one at least as bright as Venus and possibly brighter than even a full Moon. Fireballs are rare -- if you see one you are likely to remember it for your whole life. Physically, a fireball is a small rock that originated from an asteroid or comet that typically leaves a fading smoke trail of gas and dust as it shoots through the Earth's atmosphere. It is unlikely that any single large ground strike occurred -- much of the rock likely vaporized as it broke up into many small pieces. The featured picture was captured last week from a deadwood beach in Cape San Blas, Florida, USA. Piece it Back Together: Astronomy Puzzle of the Day
© Jason Rice