11.   Plans for these economy-sized space vehicles range from the conventional to the exotic.

12.   Previous engines were unable to make the two independent of each other, thus leaving the space vehicles at risk of stalling.

13.   Several companies are developing space vehicles that could take off from a domestic spaceport and carry cargo into space with almost the frequency of a jumbo jet.

14.   The award is named for Charles Draper, who invented the first guidance systems for space vehicles, strategic missiles and submarines.

15.   The device helped make the space program practical, Ford said, because space vehicles could get power from readily available sunlight.

16.   The experiments would be on unmanned space vehicles as well as in the space shuttle and the future space station programs, Clinton said.

17.   The SDI program in particular let out several contracts for space vehicles that were to be used to mount defenses in the sky.

18.   They already have bathrooms on space vehicles not much bigger than a Crown Victoria.

19.   To handle the reams of data generated by space vehicles and their payloads, NASA uses database management software by Oracle Corp.

20.   Vandenberg was left with the Titan IV, a program that launches unmanned space vehicles that thrust satellites into more-difficult-to-reach polar orbit.