The Sweden Solar System is the world's largest model of our planetary system, at a scale of 1:20 million. The sun is represented by the Globe Arena in Stockholm, the largest spherical building in the world. Distances and sizes are scaled according to 1:20 million, and. The Milky Way Galaxy is our home in the vast universe. Spanning more than 100,000 light-years in diameter, the Milky Way hosts countless solar systems, nebulae, star clusters, and possibly billions of. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. The planets, all appropriately scaled.