(Revelation of John 8:12) And the fourth angel sounded, and the third part of the sun was stricken, and the third part of the moon, and the third part of the stars, so that the third part of them was darkened, and the day did not appear for a third part of it, and the night also.
(Revelation of John 16:8-9)  And the fourth angel poured out his vial onto the sun. And it was given to him to burn men with fire.  And men were burned with great heat. And they blasphemed the name of God, He having authority over these plagues. And they did not repent in order to give Him glory.