Probably depends on your frame of reference. Since we don't know where they started or where they are today it seems plausible that, relative to our own positions they may indeed have appeared to rise even though the text references state that they descended. We have no idea whether we might go up to heaven and down to hell or just across to them. We do know that everything in our universe is in motion and has been for a long time so it could be true that today we have to rise to get to both places if in fact either of them exist at all.

Surely The Angel Of Independence must ascend, no? :)