11.   The Viking missions, which included a pair of orbiting spacecraft that gathered thousands of photographs of the Martian terrain, produced no evidence of life.

12.   Tucker is an analyst of images of the earth made by Landsat and other orbiting spacecraft.

13.   Caplinger is co-author of a study appearing in the journal Science that analyzes photos of Mars taken by an orbiting spacecraft.

14.   Shuttles typically approach orbiting spacecraft from the front.

15.   The Inspektor is designed to check the exterior of orbiting spacecraft.

16.   The orbiting spacecraft turned on its thermal emission imaging system Tuesday morning, and gamma ray spectrometer instruments have begun collecting data on the composition of the Martian surface.

17.   Twenty-five years after its last lunar mission, NASA is headed back to the moon with an orbiting spacecraft named Prospector.

18.   A mother of three, Lucid is the first American woman to board an orbiting Russian spacecraft.

19.   Lucid was the first American woman to board an orbiting Russian spacecraft and will also set an endurance record for time in space by a US astronaut.