In the book of Revelations what happened when the fourth of seven trumpets sounded?

ANSWER

A third of the sun, moon, and stars were struck dark

Revelation 8 :

(12) The fourth angel sounded his trumpet, and a third of the sun was struck, a third of the moon, and a third of the stars, so that a third of them turned dark. A third of the day was without light, and also a third of the night.
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