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

United Launch Alliance is giving members of the public a behind-the-scenes look during one of its Atlas 5 rocket flights from Cape Canaveral.

Spaceflight Now’s Stephen Clark spoke with Rolf de Groot, head of ESA’s robotic exploration coordination office, on Sept. 25, discussing the two-month launch delay of Europe’s ExoMars orbiter and landing demonstrator set to depart for Mars in 2016 and the status of an ambitious rover mission in 2018.

A United Launch Alliance Atlas 5 rocket lifted off at 7:50 a.m. EDT (1150 GMT) Thursday from pad 41 at Cape Canaveral Air Force Station with NASA’s Mars 2020 Perseverance rover.