Jan 21

Space Rocket History #145 – Surveyors 2 – 7 with a Little Apollo 12

The primary objectives of the Surveyor program, were to support the Apollo landings by: (1) developing and validating the technology for landing softly on the Moon; (2) providing data on the compatibility of the Apollo design with conditions encountered on the lunar surface; and (3) adding to the scientific knowledge of the Moon.

Link to free Mercury, Gemini, and Apollo PDF calendar.

Surveyor 3 with parts identified

Surveyor 3 with parts identified

Surveyor 4 launch

Surveyor 4 launch

The northwest wall of the Surveyor 5 crater

The northwest wall of the Surveyor 5 crater

Surveyor 6 on the plains of Sinus Medii

Surveyor 6 on the plains of Sinus Medii

Photomosaic of a panorama taken by Surveyor 7

Photomosaic of a panorama taken by Surveyor 7

Apollo 12 Astronauts visit Surveyor 3

Apollo 12 Astronauts visit Surveyor 3

Mar 26

Space Rocket History #106 – Apollo: The Mode Decision – Part 1

The mode that Apollo would use to land on the moon was the most studied, analyzed, and debated decision made for the lunar landing program.  There were four main choices Direct-ascent, Earth-Orbit Rendezvous, Lunar-Orbit Rendezvous, and Lunar Surface Rendezvous.

Direct Ascent Landing Modes

Direct Ascent Landing Modes

Lunar Surface Rendezvous

Lunar Surface Rendezvous

Rendezvous Methods

Three Rendezvous Methods

Comparison of Lander Sizes

Comparison of Lander Sizes

Apollo Spacecraft Configuration Changes

Apollo Spacecraft Configuration Changes