How far is the nearest galaxy to the milky way?
The closest spiral galaxy is Andromeda, a galaxy much like our own Milky Way. It is 2.2 million light years away from us.
If you want a way to reference light years in kilometers here it is!
One Astronomical Unit, or AU for short, is 150 million km. And in a single light year there is 63241.1 AU. And we have2.2 million light-years distance to Andromeda.
63241.1AU x 2,200,000ly = 139,130,420,000AU
139,130,420,000AU x 150,000,000km = 2.0869563e+19
So the answer is 2.0869563e+19km .