A meteor that caused a loud boom heard in western Pennsylvania on New Year's Day exploded in the atmosphere with a blast equivalent to 30 tons of TNT, NASA said on Monday.
원문출처 : https://www.cnn.com/2022/01/04/americas/meteor-pennsylvania-pittsburgh-scn/index.html
원문출처 : https://www.cnn.com/2022/01/04/americas/meteor-pennsylvania-pittsburgh-scn/index.html