| A | B |
|---|
| astronauts | people who journey into space |
| Goddard | father of modern rocketry |
| 1926 Goddard launched | the first liquid-fuel rocket |
| Wernher Von Braun | German scientist who was in charge of developing Saturn V spacecraft for NASA |
| Satellite | any object that orbits a larger object |
| 1st law of motion | an object in motion will continue moving in the same direction and at the same speed unless an outside force acts upon it |
| Sir isaac Newton | created the laws of motion |
| velocity | speed and/or direction |
| Sputnik I | Russian; 1st artificial object to orbit earth |
| Explorer I | US; 1st satellite |
| Apollo 8 | US; 1st manned spacecraft to orbit the moon |
| Apollo 11 | US; 1st mission to land on the moon |
| Challenger | US; carried last asstronauts to visit the moon |
| Yuri Gagarin | Russian; 1st person to travel in space |
| Alan Shepard | US; 1st American in space |
| John Glenn | US; 1st American to orbit the earth |
| Valentina Tereshkova | Russian; 1st woman to fly in space |
| Neil Armstrong | US; 1st human to set foot on moon |
