Q&A with Marc Rayman, chief engineer on NASA’s Dawn mission (members only)

A top secret cargo for the U.S. government’s spy satellite agency soared into orbit from Cape Canaveral at the tip of a United Launch Alliance Atlas 5 rocket Friday night, successfully debuting a new solid-fueled booster design that ULA says are cheaper and easier to handle than previous strap-on motors.

The Japanese Hayabusa 2 spacecraft dropped within a half-mile of asteroid Ryugu last week, probing its gravity field ahead of key decisions in the coming days to settle on a target site for the robotic mission’s first sample collection attempt, and the best touchdown location for a European lander stowed on the mothership.

NASA’s Mars Curiosity rover, slowly making its way up the side of a towering mountain of sedimentary rock at the center of its Gale Crater landing site, has found fresh evidence for the red planet’s past — and possibly present — habitability, scientists reported Thursday.