Q&A with Scott Bolton, principal investigator on NASA’s Juno mission

NASA’s Perseverance rover has been closed up inside its protective aeroshell, the structure that will protect the spacecraft when it plunges into the Martian atmosphere, in preparation for launch no earlier than July 20 from Cape Canaveral.

Likened to raising a cellular tower 22,300 miles high, a United Launch Alliance Atlas 5 rocket will put the Navy’s fourth mobile communications satellite into space to expands the rugged smartphone system to global coverage.

Fresh pictures from NASA’s Dawn spacecraft have provided the sharpest glimpse yet of the bright salt deposits discovered inside a crater on Ceres, the largest object in the asteroid belt.