The European Space Agency (ESA) faces a crossroads as it works to prepare flights of the Vega-C and Ariane 6 as early as this ...

To do so, the mission's goal was to study an otherwise-unremarkable comet called Comet 67P/Churyumov-Gerasimenko, a ...

The European Space Agency's Rosetta mission, which included several onboard NASA instruments, dropped a lander on Comet 67P Churyumov-Gerasimenko's nucleus, then orbited it for two years. The European ...