Photos: More Delta 4 launch shots

Relativity Space, a small launch startup aiming to fly its orbital rocket from Cape Canaveral for the first time next year, announced Wednesday it has signed a contract with Iridium for up to six launches of the company’s spare communications satellites. Relativity also announced it plans to develop a second launch pad at Vandenberg Air Force Base in California to allow for missions to polar orbits.

A Falcon 9 rocket fired into a late-night sky Friday night over Cape Canaveral with a Dragon supply ship bound for the International Space Station. Eight minutes later, the booster returned to Florida’s Space Coast for SpaceX’s 50th landing of a Falcon first stage.

A Chinese rocket placed three experimental military surveillance satellites in orbit Friday, the second set of related triplets launched in less than two months.