If it wasn’t for launch capabilities we would never have delved deep into the echo of the Big Bang nor lived out the adventures of Rosetta and Philae at Comet 67P/Churyumov-Gerasimenko. Nor would we have captured some of the Universe’s most energetic phenomena, or be on our way to the innermost planet of the solar system. Some of ESA’s biggest science missions only got off the ground—literally—thanks to the mighty Ariane 5, one of the most reliable launchers that gives access to space from Europe’s Spaceport in Kourou, French Guiana.
Source:
https://phys.org/news/2019-06-history-ariane-science-missions-onboard.html