Photos: Ariane 5 on its jungle launch pad with navigation payloads

A Vega rocket faltered minutes after liftoff from French Guiana at 9:53 p.m. EDT Wednesday (0153 GMT) and failed to reach orbit with a European-built reconnaissance satellite for the United Arab Emirates. The payload and launcher fell into the Atlantic Ocean, marking the first failure for the solid-fueled Vega launch vehicle.

Two Galileo navigation satellites arrived at the Guiana Space Center in South America on Thursday after a trans-Atlantic flight from Paris, as European officials plan the resumption of Galileo launches after a rocket mishap deposited two spacecraft in the wrong orbit last year.

Europe’s ExoMars rover will not be ready for launch in 2018, officials said Monday, forcing a two-year delay for the ambitious mission to drill into the Martian surface and search for the remnants of past life.