Mark 13:24

But in those days, after that tribulation, the sun shall be darkened, and the moon shall not give her light.

THE PROPHECY OF THE END

After that tribulation ... Not "after THE tribulation," as if this had been an apocalypse, but after the destruction of Jerusalem.

The sun shall be darkened, and the moon ... Some have construed these words as a metaphorical reference to the covering of the Sun of righteousness, so as to reduce and darken the light, accomplished by the devices of wicked men and to the failure of the church (the moon) to shine any more as God intended by reflecting the true Light that came into the world. Of course, such could be the meaning; but it seems to this interpreter that such an event would compromise the promise that "the gates of hell" shall not prevail against God's church. Therefore, the view here is that the center of our solar system will fail at the time of the end, involving as a result the failure also of the moon. If the sun was darkened at Calvary, why not again at the Second Coming?