chapter 3
Mariner 9 - Mars Missions - NASA Jet Propulsion Laboratory
Voyager, NASA's Longest-Lived Mission, Logs 45 Years in Space
NASA - NSSDCA - Spacecraft - Details
Timeline of the Space Race, 1957–69 | Britannica
Probes to the Outer Planets | Historic Spacecraft
Space race timeline | Royal Museums Greenwich
A Sudden Loss of Altitude | Air & Space Magazine| Smithsonian Magazine
Why the Soviet space workhorse Soyuz is still going strong – 50 years on | Soyuz | The Guardian
Someone Planned a Crewed Mission to Mars in the 1960s and It Would Have Been Spectacular - autoevolution
chapter 3
Apollo Returns to Its Earth-Orbital Roots (1971) | WIRED
The International Space Station: A Renaissance in Space Exploration and Research | Defense Media Network
Nuclear rocket redux - Aerospace America
Mariner Probes | Historic Spacecraft
Uncrewed spacecraft - Wikipedia
What was the space race? | Space
List of NASA missions - Wikipedia
List of Solar System probes - Wikipedia
Every mission to Mars ever | The Planetary Society
India & China: Contrasting Space Programs
50 Years After First Interplanetary Probe, NASA Looks To Future : NPR
Every Mission to Mars in One Visualization
Mariner Exploration Missions
What's Up There, Where Is It, and What's It Doing? The U.S. Space Surveillance Network | National Security Archive
Ranger | Moon Exploration, Lunar Imaging & Mapping | Britannica
Mariner space probe hi-res stock photography and images - Alamy
Mariner program - Wikipedia
