| A | B |
|---|
| artificial satellites | human-made objects that orbit other objects in space |
| astronomical satellites | research satellites to monitor waves and particles in deep space |
| bus | the body of a satellite |
| communication satellites | satellites that pick up sound, picture, and telephone signals |
| Earth station | receiver that gets signals from a satellite |
| environmental satellites | satellites that monitor how the Earth is changing |
| GPS | Global Positioning System |
| gravity | the Earth's force that pulls everything to its center |
| Low Earth Orbit | an orbit close to the Earth, 200-500 miles high |
| meteorologists | scientists that study the Earth's atmosphere, climate, and weather |
| military spy satellite | satellites that gather information about other countries |
| navigational satellites | satellites that help ships and planes know where they are |
| orbits | the paths of objects around others |
| payload | part of a satellite that carries tools |
| Polar Orbit | orbiting the North and South poles |
| solar energy | power from the sun |
| weather satellites | satellites that monitor weather |
