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

Soaring into the night sky over a guarded Russian military base, a 1.2-ton European satellite rocketed into orbit Tuesday to regularly measure how the world’s oceans and ice sheets respond to climate change and drive global weather patterns.

After an unusual stretch of excessive high-altitude winds prevented launch from French Guiana of 53 small satellites on a Vega rocket in June — and no sign of a letup in winds in the coming days — Arianespace said Wednesday that the mission will be delayed to Aug. 17 to allow time for teams to recharge launcher and payload batteries.

The nearly $1.9 billion BepiColombo mission to Mercury jointly developed by the European Space Agency and the Japan Aerospace Exploration Agency lifted off Friday night from French Guiana aboard an Ariane 5 rocket. Launch occurred at 9:45 p.m. EDT Friday (0145 GMT Saturday).