Photos: More Delta 4 launch shots

Powered by two Russian-made RD-181 main engines, a Northrop Grumman Antares rocket fired into a mostly sunny sky Saturday afternoon over Virginia’s Eastern Shore carrying nearly 7,500 pounds of equipment to the International Space Station.

A SpaceX Falcon 9 rocket powered by a reused first stage climbed into orbit Tuesday from California’s Central Coast, carrying five satellites to upgrade Iridium’s global messaging service and two research craft to study Earth’s water cycle.

Follow the key events of the Falcon 9 rocket’s ascent to orbit with the second set of 10 next-generation satellites for Iridium’s voice and data relay fleet.