SpaceX has won a NASA contract for the launch of the Imaging X-Ray Polarimetry Explorer (IXPE) mission on a Falcon 9 in April 2021. Launch cost is $50.3 million (lower than DART, awarded in April for $69M.) https://t.co/q5yYTzsd2i

— Jeff Foust (@jeff_foust) July 8, 2019