Alaskans spotted a fireball dropping through the sky during the annual Ursid meteor shower. But what exactly is a fireball?
and vanishing from view behind some houses. Brettschneider wrote that the camera was pointed north and the video was captured at 5:47 a.m. Wednesday. Meteors slow down and heat up when entering the atmosphere. Fireballs are "exceptionally bright" meteors that can be seen over a very wide area,"In front of it, a bow shock develops where atmospheric gases are compressed and heated.
The Ursid meteor shower, which is visible in the Northern Hemisphere from Dec. 13–24, peaks on Dec. 22, the
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