I read this story online, maybe 2 years ago. It was about a group of people (the size of a village IIRC) who somehow got transported to another universe, where the gravitational constant was orders of magnitude higher than ours.
The funky consequences of this were explored in the story -- I remember a scene where someone put their hand near a local lifeform to feel its gravitational field. Stars were much smaller and shorter lived due to the dramatically increased gravity. The people lived on a "lifeboat" in orbit around a star, which IIRC was a few km across and had a lifespan of a few years. A major plot point was the fact that they needed to move to another star, because theirs was nearing the end of its lifespan. In the end, they succeed to do just this.