“These objects are useful for many purposes, such as navigation, collecting atmospheric data to make weather predictions, and communications for cellular phones and the Internet. Some — collect visual information of the Earth’s surface as they orbit the Earth. Others carry instruments to observe the presence of and interaction between the land, ocean, air, and living things. Because scientists can gather very specific information regarding atmospheric phenomena, they can compare — images with ground research and knowledge of Earth’s natural history to analyze how the environment has changed over time.”
satellites