In Sliders, Quinn Malory creates an absurdly benign wormhole. On travelling through it the characters wind up at approximately the same location in the other universe. They always seem to land where they want (usually the same spot on Earth), even though Earth is constantly moving very fast, and even though Earth is a tiny speck in an infinitely sprawling universe.
It seems especially odd in multiverse theory, where the parallel universe isn't necessarily layered on another universe in another dimension, but may be a physically separate location somewhere - how do they pin-point the location? Heck, how do they even set coordinates within our own universe?
This video by Isaac Arthur is what inspired me to ask this question. He says:
[Talking about the show Sliders] "I don't remember what specific handwave they were using, if any, for why this always opened up on Earth and a close parallel of our society, rather than randomly dumped into space, or at a Big Bang..."
Is there an explanation for this?