Live coverage: Soyuz crew returns to Earth

The International Space Station’s oldest sections launched nearly 17 years ago, and with the huge orbiting research complex now well into its operational life as a microgravity science lab, prime contractor Boeing’s job is keeping the outpost going, according to Mark Mulqueen, who manages the aerospace company’s space station program.

NASA has signed a $187 million contract with Northrop Grumman to complete the preliminary design of a pressurized crew habitat for the planned Gateway mini-space station near the moon, and agency officials have discussed new details about plans to launch first two Gateway modules on a single heavy-lift rocket.

SpaceX readied a Falcon 9 rocket for takeoff Monday to launch a planet-hunting satellite for NASA that will monitor the light from countless stars to find potentially habitable planets worthy of follow-up studies by more powerful ground- and space-based observatories.