NASA today awarded the rocket startup Relativity the contract to provide the service module, rocket, and operations for the launch of its proposed four instrument Aeolus Mars orbiter, focused on studying the Martian atmosphere.

NASA will provide the Aeolus atmospheric‑science instrument payload suite, while Relativity Space supplies the spacecraft, rocket, and cruise operations necessary to deliver the instruments to Mars.

…Aeolus, scheduled to launch in 2028, is a NASA‑developed suite of four complementary instruments designed to provide the first integrated, daily, global view of Martian winds, temperatures, dust, and clouds. By improving models for dust, winds, temperature, and seasonal atmospheric behavior, Aeolus will generate the detailed environmental knowledge required to reduce risk for future crewed and uncrewed landings. These measurements will directly inform entry, descent, and landing systems and support safer, more predictable mission planning for astronauts.

…NASA will support operations of science instruments for at least one Martian year, while Relativity Space maintains the spacecraft.

The announcement made no mention of contract price. Relativity meanwhile has only launched once, a failure of its small Terran-1 rocket in 2023, after which the company abandoned that 3D-printed design to focus on its larger Terran-R rocket, which it hopes to launch for the first time before the end of this year.