chapter 3
:focal(1126x1410:1127x1411)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/50/16/5016b9d7-7a93-494d-aa28-5468c7053063/apollo_11_lunar_module.jpg "Apollo 11 Astronaut Michael Collins on the Past and Future of Space Exploration | Science| Smithsonian Magazine")
Apollo 11 Astronaut Michael Collins on the Past and Future of Space Exploration | Science| Smithsonian Magazine
Timeline of the Space Race, 1957–69 | Britannica
Space exploration - Astronauts, Satellites, Stations | Britannica
Earth's sun: Facts about the sun's age, size and history | Space
The International Space Station: A Renaissance in Space Exploration and Research | Defense Media Network
Mariner 9 – The first Spacecraft to Orbit another Planet | SciHi Blog
What's Up There, Where Is It, and What's It Doing? The U.S. Space Surveillance Network | National Security Archive
Space probe 1960s hi-res stock photography and images - Alamy
Mariner space probe hi-res stock photography and images - Alamy
Probes to the Outer Planets | Historic Spacecraft
Space race timeline | Royal Museums Greenwich
Chandrayaan Apollo Artemis Luna NASA ISRO Roscosmos Successful Moon Missions Launched Till Date
Why the Soviet space workhorse Soyuz is still going strong – 50 years on | Soyuz | The Guardian
Mariner Probes | Historic Spacecraft
How Voyager missions became a grand tour of the Solar System | Opinions | Al Jazeera
Apollo Returns to Its Earth-Orbital Roots (1971) | WIRED
List of NASA missions - Wikipedia
Mariner 9 probe hi-res stock photography and images - Alamy
Nuclear rocket redux - Aerospace America
Ranger | Moon Exploration, Lunar Imaging & Mapping | Britannica
Mariner Exploration Missions
Ranger | Moon Exploration, Lunar Imaging & Mapping | Britannica
List of Solar System probes - Wikipedia
