Once built and orbited in 2017, TESS will search space for planets orbiting nearby stars, and those planets would then receive extra attention from other NASA space- and ground-based telescopes. Orbital will cooperate with MIT and NASA's Goddard Space Flight Center on the $200 million mission.
Orbital's own share of this sum is expected to be worth $75 million, which will be paid to the company over the course of its work on the four-year contract. As such, this single TESS contract stands to account for more than 1% of the company's revenues over the next four years.
Orbital shares were up 1.7% on today's news, and transiting $17.60.