Q&A with Rolf de Groot, head of ESA’s robotic exploration office

A Russian Soyuz rocket flew into space from the edge of the Amazon on Thursday, carrying a pair of European navigation satellites in the third launch in nine months for the multibillion-dollar Galileo program. Liftoff from French Guiana occurred on time at 1151:56 GMT (6:51:56 a.m. EST).

The ExoMars Trace Gas Orbiter, a Russian-launched, European-built spacecraft that arrived at Mars in October, is starting to dip into the upper reaches of the red planet’s atmosphere in a year-long “aerobraking” campaign place the observatory in the right position to hunt for methane, an indicator of potential biological activity.

The planned Halloween launch of the James Webb Space Telescope — one of eight Ariane 5 launches left before the rocket’s retirement — and a series of flights to build out OneWeb’s satellite internet network highlight Arianespace’s schedule this year.