Thanks to its reusable, low-cost Falcon 9 rocket, SpaceX has been able to slash prices for large commercial satellites that could be lofted by the Ariane 6. Whereas Europe's Ariane vehicles once played a dominant role in launching geostationary satellites, they've lost considerable market share since 2014. Moreover, through its rideshare program for the Falcon 9, SpaceX also threatens to take missions away from Vega-C, which has a lift capacity of about 1.5 tons to polar orbit.

Ars