Summary
The Milky Way is a leader board, conceptually linking star clusters to our actual galaxy. The feature was added in Patch 0.7.18.6914, and displays Total Number of Dyson Spheres constructed by all players, their combined power generation, and the total number of solar sails.
The player's own games will be identified with their name and an indicator circle, based on their games' cluster address. Each player who plays the same cluster address (seemingly commingling the last address segment) is ranked for the one star on the galaxy.
The view can be panned and zoomed with standard mouse actions (click and drag, middle mouse wheel).
Clicking on a star will provide the details of the player with the highest power generation in that specific cluster in a fly-out card (pictured, right).
Double clicking will provide that system's expanded leader board.