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
Probes to the Outer Planets | Historic Spacecraft
Ranger | Moon Exploration, Lunar Imaging & Mapping | Britannica
Voyager, NASA's Longest-Lived Mission, Logs 45 Years in Space
Space exploration - Astronauts, Satellites, Stations | Britannica
Mars Probes | Historic Spacecraft
Ulysses | Solar Wind, Jupiter & Sun | Britannica
What's Up There, Where Is It, and What's It Doing? The U.S. Space Surveillance Network | National Security Archive
Chandrayaan Apollo Artemis Luna NASA ISRO Roscosmos Successful Moon Missions Launched Till Date
List of Solar System probes - Wikipedia
Timeline of the Space Race, 1957–69 | Britannica
NASA - NSSDCA - Spacecraft - Details
Mariner Exploration Missions
Mariner program - Wikipedia
chapter 3
chapter 3
Mariner space probe hi-res stock photography and images - Alamy
India & China: Contrasting Space Programs
Every mission to Mars ever | The Planetary Society
Mariner 9 - Mars Missions - NASA Jet Propulsion Laboratory
Space race timeline | Royal Museums Greenwich
Space probe 1960s hi-res stock photography and images - Alamy
