NASA
Mariner Planetary Space Probes
This web page contains information about the Mariner space probes. It gives detailed pictures of the probes.
Smithsonian Institution
National Air and Space Museum: Milestones of Flight
This Smithsonian National Air and Space Museum site tells the history of fight with an easy to use timeline. Also, find out about specific flights in the list of links.
NASA
Nasa Star Child: Space Probes to Venus
A brief discussion of the space probes that have reached the planet Venus.