Assertion: deep space | /r/HasProperty | ds1
Facets:
Source sentences:
text: Deep Space 1 (DS1), which NASA launched in 1998, demonstrated the long-duration use of a xenon-propelled ion thruster on a science mission, and validated a number of technologies, including the NSTAR electrostatic ion thruster, as well as performing a flyby of an asteroid and a comet.
text: This mission was something special -- even its name was out of the ordinary: Deep Space 1 (DS1).