Both companies are already deeply involved in the space business. Armadillo, for example, provides the rocket engines for the Rocket Racing League's X-Racer planes, is working on a suborbital spaceship for tourists, and plays a supporting role in the "Project M" plan to send a robonaut to the moon. Masten is partnering with XCOR Aerospace, one of its neighbors in Mojave, Calif., to develop landers that can go anyplace NASA might want to visit.