Live coverage: Orion lands in Pacific

SpaceX launched an unpiloted Crew Dragon spacecraft aboard a Falcon 9 rocket from pad 39A at the Kennedy Space Center at 10:30 a.m. EST (1530 GMT) Sunday. SpaceX triggered an escape maneuver using the Dragon’s thrusters about a minute-and-a-half after liftoff to verify the launch abort engines can safely carry the capsule — and astronauts on future missions — away from a failing rocket.

Lockheed Martin, the largest U.S. defense contractor, announced late Sunday that it has reached a deal valued at $4.4 billion to acquire Aerojet Rocketdyne, a supplier of engines to NASA’s Space Launch System moon rocket and United Launch Alliance’s Atlas, Delta, and Vulcan rockets.

India’s first dedicated astronomical observatory lifted off at 0430 GMT (12:30 a.m. EDT) Monday aboard a Polar Satellite Launch Vehicle, riding into a 400-mile-high orbit to begin a five-year mission studying the births and deaths of stars.