Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. Mariner 10 was the seventh successful launch in the Mariner series and the first spacecraft to use the gravitational ...

The main working hypothesis for the Mercury problem says that the planet is the victim of a collision with a different-sized object. The cataclysmic collision stripped much of the planet's mantle and ...

This is a shortened version of the film "Mercury: Exploration of a Planet ." This film provides a brief description of the Mariner 10 mission, and explains how the spacecraft used gravity assist.