- Race for Space 1: Dawn of the Space Age
- Race to Space
- Racing the Moon’s Shadow with Concorde 001
- Radial-velocity Searches for Planets Around Active Stars
- Radiation Safety Problems in the Caspian Region
- Radio and Radar Astronomy Projects for Beginners
- Radio Recombination Lines
- Radio Telescope Reflectors
- Rare Astronomical Sights and Sounds
- Raum und Zeit
- Real Astronomy with Small Telescopes
- Real Space
- Real Time
- Reality Is Not What It Seems
- Reality vs Quantum Mysticism
- Rebel Star
- Recent Advances in Spectroscopy
- Recollections of "Tucson Operations"
- Reconstruction of the Planetary Soul
- Recreations in Astronomy - With Directions for Practical Experiments and Telescopic Work
- Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work
- Red Dwarfs
- Reflections on the Astronomy of Glasgow
- Reheating After Inflation
- Reinventing the Universe
- Reise in die Unendlichkeit
- Reiseziel Sternenhimmel
- Rejsen ud af kaninens pels
- Rejuvenating the Sun and Avoiding Other Global Catastrophes
- Relatively Spacious: Space and Time and our Place Within It
- Relativistic Astrophysics and Cosmology
- Relativistic Astrophysics and Cosmology – Einstein’s Legacy
- Relativistic Celestial Mechanics of the Solar System
- Relativistic Jets from Active Galactic Nuclei
- Relativity for Everyone
- Relativity without Spacetime
- Relatività, quanti, chaos e altre rivoluzioni della fisica
- Religions and Extraterrestrial Life
- Remote Compositional Analysis
- Remote Observatories for Amateur Astronomers
- Rendezvous mit dem Universum
- Report on CCD Activities at the Bronberg Observatory in 2007: Berto Monard (Bronberg Observatory Rep...
- Report Series
- Report Series: Committee on Astrobiology and Planetary Science
- Report Series: Committee on Astronomy and Astrophysics: Small Explorer Missions
- Research On "The Creation and End of the Universe"
- Research on Teaching Astronomy in the Planetarium
- Resilient Space Systems Design
- Resistencia
- Respostas de um astrofísico
- Return to Earth
- Return to the Far Side of Planet Moore!
- Return to the Moon
- Returning People to the Moon After Apollo
- Revealing the Most Energetic Light from Pulsars and Their Nebulae
- Review and Assessment of Planetary Protection Policy Development Processes
- Reviews in Frontiers of Modern Astrophysics
- Riccioli d'oro e gli orsetti d'acqua
- Reviews in Frontiers of Modern Astrophysics
- Riccioli d'oro e gli orsetti d'acqua
- Ring Current Investigations (Enhanced Edition)
- Riscrivere la genesi
- Rising Time Schemes in Babylonian Astronomy
- Robotic Exploration of the Solar System
- Robots In Space
- Rock Legends
- Rocket Men
- Rocket Ranch
- Rocket Science
- Rockets and People, Volume I - Memoirs of Russian Space Pioneer Boris Chertok, Early Years Through W...
- Rockets and People, Volume II: Creating a Rocket Industry - Memoirs of Russian Space Pioneer Boris C...
- Rockets and People, Volume III: Hot Days of the Cold War - Memoirs of Russian Space Pioneer Boris Ch...
- Rockets Are Meant To Soar
- Rocks from Space
- Romancing The Moon
- Rosetta Stone of Astronomy
- Rosetta: The Remarkable Story of Europe's Comet Explorer
- Rosso Marte
- Rotation of Planets & Inertia
- Roter Mond
- Rotácia planét a zotrvačnosť
- Ruimtevaart in Europa
- Ruimtevaart in Nederland
- Russia's Cosmonauts
- Russian Planetary Exploration
- Russian Space Probes