Satellites

A satellite is an object that orbits around a planet or other celestial body. In the context of space and technology, satellites are artificial objects placed into orbit around the Earth, other planets, or celestial bodies. They are used for various purposes, including communication, navigation, weather monitoring, and scientific research.

Types of Satellites

There are several types of satellites, each serving different purposes:

• Communication Satellites: These satellites are used to transmit television, telephone, and internet signals across long distances.
• Navigation Satellites: These satellites are used for navigation and positioning, such as the GPS (Global Positioning System) satellites.
• Weather Satellites: These satellites are equipped with instruments to monitor and predict weather patterns and phenomena.
• Observational Satellites: These satellites are used for scientific research, Earth observation, and monitoring environmental changes.

How Satellites Work

Satellites are launched into space using rockets and are placed into specific orbits around the Earth. Once in orbit, they continuously circle the Earth while performing their designated functions. Communication satellites receive signals from the ground, amplify them, and retransmit them to another location on Earth. Navigation satellites constantly broadcast signals that can be picked up by GPS receivers on Earth to determine the receiver's position and time. Weather satellites capture images and data from space to monitor and predict weather patterns.

Study Guide Questions

1. What is a satellite?
2. What are the different types of satellites and their purposes?
3. How are satellites launched into space?
4. Explain how communication satellites work.
5. What is the function of navigation satellites?
6. How do weather satellites contribute to monitoring and predicting weather patterns?