| A | B |
|---|
| Space Probe | An artificial satellite that is sent away from Earth to gather data on other planets. |
| Cold War | A period of time between the USA and the USSR that promoted nuclear arms buildup and the Great Space Race. |
| Venera 9 | USSR space probe, sent to gather data about Venus. |
| Magellan | USA space probe, sent to Venus to gather data. |
| Viking 1 and 2 | USA space probes sent to Mars to gather data. |
| Pathfinders 1 and 2 | USA space probes sent to Mars to gather data. |
| Voyager 1 and 2 | Space probes sent by the USA to explore the outer solar system. |
| The Great Space Race | Part of the Cold War, a race for superiority in space exploration between the USA and the USSR. |
| Laika the dog | First living being to orbit the Earth, USSR. |
| Yuri Gagarin | First human being to orbit the Earth, USSR. |
| John Glenn | First American to orbit the Earth, USA. |
| Friendship 7 | The name of John Glenn's space capsule, USA. |
| Cosmonaut | Russian equivlalent to the American astronaut. |
| Neil Armstrong | First human being to walk on the moon, USA. |
| Buzz Aldrin | 2nd human being to walk on the moon, USA. |
| Famous quotation by Neil Armstrong as he stepped onto the moon | "That's one small step for man, one giant leap for mankind." |
| Apollo 11 | The moon mission that first landed man on the moon, USA. |
| Space shuttle | A recyclable type of space vehicle that takes off like a rocket, but lands like an airplane. |
| International Space Station | A joint effort among all nations with space programs to continue space studies and exploration. |
| Mir | Early Russian space station. |
