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Joel Shurkin asked:
Stories about rogue or nomad planets, planets without suns…?
Bill DeSmedt answered:
Not sure if this qualifies, but Fritz Leiber’s “A Pail of Air” (Galaxy, December 1951) is a short story about Earth as a planet without a sun:
“… the dark star snatched us away from the sun, and by now it’s dragged us out beyond the orbit of the planet Pluto.”
The story can be found here.
Phillip Gerba answered:
There was a “Star Trek: Enterprise” episode about that:
"Star Trek: Enterprise" Rogue Planet (TV Episode 2002) - IMDb"
Heather Hile answered:
The novel Nemesis by Issac Asimov is about a rogue planet headed for Earth.
When Worlds Collide is probably the first film to deal with the topic. There’s been a few since.
Jim Baerg answered:
Satan’s World by Poul Anderson involves a rogue planet about to be thawed by a close pass by a star, and the uses an interstellar civilization could make of it.
When Worlds Collide/After Worlds Collide were novels by Edwin Ballmer and Philip Wylie.
Leviathan Wakes James SA Corey, 2021. Ceres is weaponised by the protomolecule.