Live coverage: Ariane 5 rocket deploys satellites for Australia, India

Rocket Lab’s light-class Electron launcher is set to take off on its fifth flight from New Zealand, aiming for a 264-mile-high (425-kilometer) orbit with DARPA’s R3D2 technology demonstration satellite.

A SpaceX Falcon 9 rocket ignited its nine kerosene-fueled Merlin engines on the launch pad at Cape Canaveral on Tuesday evening in a critical milestone before liftoff with a commercial Thai communications satellite later in the week.

Two weeks after a launch pad fire forced a delay, a Japanese H-2B rocket lifted off Tuesday with an HTV cargo freighter to deliver upgraded batteries, experiments and provisions to the International Space Station. Liftoff from the Tanegashima Space Center occurred at 1605 GMT (12:05 p.m. EDT) Tuesday.