Live coverage: International Space Station crew lands in Kazakhstan

NASA has selected SpaceX to build a spacecraft to land the first astronauts on the moon since 1972, choosing Elon Musk’s space company over competing proposals from Jeff Bezos’s Blue Origin and the aerospace firm Dynetics, officials announced Friday.

It’s Steve Clarke’s job to merge the goals of space scientists with NASA’s strategic plans for exploring the solar system, two factors which are not always in lock-step, as the space agency seeks to return humans to the moon, and eventually send astronauts to Mars.

Continuing a series of delays keeping NASA’s Ionospheric Connection Explorer on Earth, NASA announced Tuesday that the satellite’s launch aboard an air-dropped Northrop Grumman Pegasus XL rocket will not occur as scheduled Friday.