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eye in the sky environment earth volcanoes hurricanes tornadoes wildfires storm surges torrential rains brushfires earthquakes natural disasters wade davis ethnobotanists aerial photography satellites pollution atmospheric ozone layer antarctic hole floods dams deforestation desertification overpopulation growth satellites imaging agricultural grazing mars red planet archaeology war diplomacy mount saint helens mt. st. hurricane gladys san francisco 1989 san andreas fault nasa's goddard space flight center iraq kurdish refugees national geographic photographs videos clips eye in the sky volcanoes hurricanes tornadoes wildfires storm surges torrential rains brushfires earthquakes natural disasters environment ethnobotonists aerial photography satellites pollution atmospheric ozone layer antarctic hole floods dams deforestation desertification overpopulation growth land-clearing agricultural grazing satellite archaeology war earth mount saint helens mt. st. hurricane gladys san francisco 1989 san andreas fault

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National Geographic: Eye in the Sky--Earth, environment

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National Geographic explores the Earth and its environment with video clips and photos of volcanoes, tornadoes, natural disasters, and human impacts

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Satellites contain Atomic Clocks that make each interaction accurate to suit our time and prevent our lag.

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Catalog of Earth Satellite Orbits : Feature Articles

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Different orbits give satellites different vantage points for viewing Earth. This fact sheet describes the common Earth satellite orbits and some of the challenges of maintaining them.

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Satellites - Types and Uses of Satellites

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Satellites can be classified by their function since they are launched into space to do a specific job. The type of satellite that is launched to monitor cloud patterns for a weather station will be different than a satellite launched to send television signals across Canada.

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History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a beach ball (58 cm.or 22.8 inches in diameter), weighed only 83.6 kg. or 183.9 pounds, and took about 98 minutes to orbit the Earth on its elliptical path.

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Sputnik I, the first satellite sent into space

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Sputnik I, the first satellite sent into space

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History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a beach ball (58 cm.or 22.8 inches in diameter), weighed only 83.6 kg. or 183.9 pounds, and took about 98 minutes to orbit the Earth on its elliptical path.

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Satellite: An artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.

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The Goddard Space Flight Center's lists 2,271 satellites currently in orbit. Russia has the most satellites currently in orbit, with 1,324 satellites, followed by the U.S. with 658.