John Hanke, CEO of Niantic, said at Apple's iPhone event that players have covered a whopping 4.6 billion kilometers since the game's July 6 release.
For reference, the distance from the sun to Neptune is just under 4.5 billion kilometers. Neptune is the eighth -and farthest - planet from the sun
It took NASA probe Voyager 2 12 years to cover that distance. Pokémon Go players did it in two months.