TL;DR
When you open the space map, the view should start at the same spot it was when you last closed it.What?
Currently, each time you open the space map, the view is reset to the center, and the zoom level is reset. Instead, it should remember the previous position and zoom level, and restore those when you open the space map again. It should also restore the view when using the back and forward mouse buttons to go to and from the space map.This would likely also require a way to prevent the player from panning too far from the origin, on the space map, so they can't end up with a view that only has empty space. That isn't an issue right now because if that happens, the player can simply close and reopen the space map.
Why?
Using the space map can be frustrating due to the lack of this feature. It's especially annoying when using mods that add new planets far from Nauvis, such as "Metal and Stars" which adds a new star system. In this case, the space map starts out without any planets being visible, with the only visible thing being the connection between the two star systems.(This feature request was also briefly made here, but that thread seems to mostly be about a different issue so I think it makes sense to have a separate thread for this.)