Oh boy, now we run into the problem of "there is no such thing as a neutral universal spatial grid/position". Since all position is relative, perhaps pressing the button locks it in place relative to the sun instead of the planet? Maybe this special version is marked with a sun symbol, if you're lucky.

Also note that Immovable Rods typically have a maximum weight or Strength check that can either cause them to deactivate or move them or whatever. 8,000 pounds and DC 28 Str come to mind from one or another version, so this probably wouldn't tear through the whole planet, but it could still rough up some buildings and moderate rock.