| A | B |
|---|
| planets | large objects that orbit the sun |
| orbit | curved path traveled by planets around the sun |
| artificial satellites | objects built by jumans to be launched into space to orbit the Earth |
| gravitational pull | force of attraction between objects |
| rockets | vehicles that carry tools into space |
| satellite | an object that revolves around another object |
| solar system | the sun and objects that orbit it, including planets, their satellites, and other smaller objects |
| space probes | instruments launched by rockets and sent to distant places too far away to send astronauts |
| space shuttles | reusable vehicles made to carry astronauts to and from space |
| telescopes | tools to view distant objects |
| tides | rise and fall of ocean water's surface |
