No Shortage of Dreams

ROMBUS: Reusable Orbital Module - Booster & Utility Shuttle (1963)

Apollo-Soyuz II (1974)

Testing Shuttle Manipulator Arms During Earth-Orbital Apollo Missions (1971-1972)

Viking on the Moons of Mars (1972)

Space Shuttle External Tank (ET) Applications: ET as Space Facility (1982)

Nomad Explorer (1992)

A Long Way Home: Abort from Piloted Mars and Venus Missions (1970)

The Proper Course for Lunar Exploration (1965)

Project Hyreus (1993)

Human Exploration Using Real-Time Robotic Operations (HERRO) (2009-2011)

S-IVB/IU Applications: The LASS Proposal (1966)

Reusable One-stage Orbital Space Truck (ROOST) (1962)

A Robotic and Piloted Planetary Exploration Program for the 1970s and Early 1980s (1968)

A Year in Orbit Using Apollo Technology: Command and Service Module for Longevity (1966)

Chronology: Piloted Flybys 1.0

An Unfortunate Condition: A 1967-1968 Pitch to Launch a Comet Halley Rendezvous Mission in the Late 1970s

MSSR as MEM (1967-1968)

Mars Sample Return Site Selection and Sample Acquisition Study (1980)

NASA's Planetary Joint Action Group Piloted Mars Flyby Study (1966)

Samuel Herrick's "Outrageously Innovative" Proposal (1971)

Engineer Special Study of the Surface of the Moon (1960-1961)

Integral Launch and Reentry Vehicle: Triamese (1968-1969)

Electromagnetic Launching as a Major Contribution to Space-Flight (1950)

Rendezvous Concept for Circumlunar Gemini (1965)

Apollo to Mars & Venus: North American Aviation's 1965 Plan for Piloted Planetary Flybys in the 1970s