Lunar Prospector was a small spin stabilized lunar orbiter. Using its Gamma Ray Spectrometer (GRS), it collected a large amount of scientific data that helps researchers understand the chemical composition of the lunar surface.

The Athena II is an American small expendable launch system which was used for three launches between 1998 and 1999.

Lockheed Martin's Space Division started in the production of missiles and later ICBM's in the 1950s. Their TITAN missile system was used for 12 Gemini spacecraft and the Voyager probes. They have worked largely in collaboration with NASA on many of their probes, landers, and spacecraft, and hope to play a key role in NASA's return to the moon in 2024.

• Discovery Program

  Exploration
  The Discovery Program is a series of Solar System exploration missions funded by the U.S. National Aeronautics and Space Administration (NASA) through its Planetary Missions Program Office. The cost of each mission is capped at a lower level than missions from NASA's New Frontiers or Flagship Programs. As a result, Discovery missions tend to be more focused on a specific scientific goal rather than serving a general purpose.
  Program infoProgram wiki