There definitely are some funky things indicated respecting the sun, and the heavens. The following two verses probrably are referencing some sort of space fog:
Re 6:12 And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
Re 8:12 And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkened, and the day shone not for a third part of it, and the night likewise.
Re 16:8 is similar to Ex 10:22, but worse in that the previous plagues continue. I don't claim to have any idea what's going on in Re 19:17 but it is quite fascinating:
And I saw an angel standing in the sun; and he cried with a loud voice, saying to all the fowls that fly in the midst of heaven, Come and gather yourselves together unto the supper of the great God;
And what's this? A comet?
Re 8:10 And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters;
Good thing I won't be around to see any of this, no matter when it starts.