Photos: Delta 4 rocket fires off the pad before sunset

The 100th flight of a Falcon 9 rocket delivered 60 satellites to orbit for SpaceX’s Starlink network Tuesday night, adding another building block to a planned fleet of thousands of solar-powered space-based relay stations to beam broadband connectivity around the world.

The Global Positioning System, its precision navigation and timing services made possible by the U.S. Air Force and provided free-of-charge to the planet’s civilian population, is a marvel of the modern world, and the orbiting network will receive a fresh satellite Wednesday.

Packed with nearly 3 tons of rocket fuel, water, oxygen and crew provisions, the Russian Progress MS-12 supply ship and its Soyuz booster arrived at a launch pad Sunday at the Baikonur Cosmodrome in Kazakhstan, moving a step closer to liftoff Wednesday on a fast-track three-hour flight to the International Space Station.