Falcon Heavy hot fire as seen from Kennedy Space Center Press Site

Lockheed Martin will build two communications satellites for Saudi Arabia’s Arabsat, and Arianespace and SpaceX will launch the commercial relay platforms under contracts valued at $650 million announced Wednesday.

An Ariane 5 rocket emerged from the final assembly building at the Guiana Space Center in South America on Monday for the journey across the tropical spaceport to the ELA-3 launch zone, where the 179-foot-tall (54.8-meter) booster will lift off Tuesday with a pair of commercial communications satellites.

A SpaceX-owned supply ship arrived at the International Space Station on Sunday with 2.4 tons of cargo, including space debris and solar energy monitors mounted in the Dragon spacecraft’s external payload bay and more than 3,400 pounds of gear inside its reused pressurized module.