A meteor exploded above Earth with ten times the energy of Hiroshima's atomic bomb.
Nobody saw or even noticed the fireball exploding over the Bering Sea on 18 December 2018 – until now. (The image above is an original.)
The Libra: It's the biggest explosion since the meteor exploded in 2015 over Chelyabinsk, Russia – and the largest in 30 years, says the BBC. It was 10 meters wide and the energy released when it exploded in the Earth's atmosphere was equivalent to 173 kilotons of TNT. This is about ten times larger than the atomic bomb used in 1945 in Hiroshima.
Discovery : NASA finally learned of the explosion of military satellites that emitted light as it exploded. The fireball was also discovered by Peter Brown at the University of Western Ontario, Canada, who announced his discovery on Twitter. He examined data from around 16 different infrared stations that were originally set up to listen for covert nuclear tests.
Rare: Lindley Johnson, NASA's Planetary Defense Officer, told the BBC that an explosion of this magnitude will take place approximately every two to three times every 100 years.
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