Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

NASA announced Monday it will order at least six reusable Orion crew capsules from Lockheed Martin for $4.6 billion to fly astronauts to the vicinity of the moon in the 2020s, and the agency said it plans to purchase hardware for up to 12 Orion vehicles by 2030.

SpaceX test-fired the Crew Dragon spacecraft’s eight SuperDraco abort engines Wednesday at Cape Canaveral, paving the way for a high-altitude rocket escape test and demonstrating engineers have apparently fixed the problem that triggered an explosion during a similar ground firing in April.

NASA’s decision to launch a satellite to search for planets around other stars on a SpaceX Falcon 9 rocket in 2017 will allow officials to cancel plans to order a solid-fueled kick motor to send the telescope into a unique high-altitude orbit, the mission’s top scientist said.