The Sky at Night S2019E07 - Space Mission Special

Only a handful of missions are sent into space every decade, but how do we decide which missions are cleared for launch and which are grounded?

This month the Sky at Night goes behind the scenes as the European Space Agency select their next F-class mission, scheduled to be launched in 2028. And we meet the British teams vying to have their ideas selected, including a revolutionary mission to a comet.