When we think about teleportation, there’s always someone talking about how you should take into account the earth and the sun moving through space. Let’s step back a little (not so much) what if the galaxy we’re currently in is rotating really really fast around another, bigger, still unknown, spacial object?
Currently the closest thing to a universal reference point we have is the cosmic microwave background. Relative to that we move at about 370 km/s ± 60 km/s, depending on the time of the year and day.