What you just quoted from the 6th Seal closely matches what Jesus said would happen after the tribulation:
Matthew 24:29
29Immediately
after the tribulation of those days shall the sun be darkened, and
the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
A deeper study reveals that Jesus was also quoting Isaiah here:
Isaiah 13:9-13
9Behold, the day of the LORD cometh, cruel both with wrath and fierce anger, to lay the land desolate: and he shall destroy the sinners thereof out of it.
10For the
stars of heaven and the constellations thereof shall not give their light: the sun shall be darkened in his going forth, and the moon shall not cause her light to shine.
11And I will punish the world for
their evil, and the wicked for their iniquity; and I will cause the arrogancy of the proud to cease, and will lay low the haughtiness of the terrible.
12I will make a man more precious than fine gold; even a man than the golden wedge of Ophir.
13Therefore
I will shake the heavens, and the earth shall remove out of her place, in the wrath of the LORD of hosts, and in the day of his fierce anger.
Isaiah 34:4
4All the stars of heaven will be dissolved.
The skies will be rolled up like a scroll,
and all their stars will fall
like withered leaves from the vine,
like foliage from the fig tree.
And Joel:
Joel 2:10
10Before them the earth quakes;
the heavens tremble.
The sun and moon
grow dark,
All elements that are present between Matthew 24 and Revelation 6 are in Isaiah. This isn't an accident as the New Testament writers would have been very familiar with this sort of apocalyptic language: stars, sun, moon, heavens trembling and rolling up like a scroll, an earthquake, and even reference to the fig tree.