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Contents

  1. Table of Contents:
  2. Astronomy Beginner's Guide
  3. National Optical Astronomy Observatory
Artificial Satellites of Earth and Their Orbits

Satellites can determine long-term patterns of rainfall, vegetation cover, and emissions of greenhouse gases. Earth observation satellites can monitor ocean and wind currents as well as the extent of forest fires, oil spills, and airborne pollution; together this information helps organize emergency responders and environmental cleanup.

Table of Contents:

Satellites can take the "search" out of "search and rescue" for people in distress in remote regions. Distress radio beacons directly linked to a search and rescue satellite can lead rescuers quickly and accurately to a land, sea, or air emergency location.

Satellites can detect underground water and mineral sources; monitor the transfer of nutrients and contaminants from land into waterways; and measure land and water temperatures, the growth of algae in seas, and the erosion of topsoil from land. They can efficiently monitor large-scale infrastructure, for example fuel pipelines that need to be checked for leaks, which would require enormous hours of land- or air-based inspection.

Imaging satellites produce high-resolution data of almost the entire landmass on earth; such data used to be a closely guarded military capability, but now, nearly anyone with an internet connection can find his house using Google Earth. Satellites are increasingly important to the developing world.


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Earth observation satellites also allow developing countries to practice informed resource management and relief agencies to follow refugee population migrations. Before the Space Age, astrophysicists were limited to studying the universe via ground-based telescopes, and so could only use information from the parts of the electromagnetic spectrum that penetrated the Earth's atmosphere. Many of the most interesting phenomena are best studied at frequencies that are best or only accessible from space—satellite telescopes have been critical to understanding phenomena like pulsars and black holes as well as measuring the age of the universe.

The Hubble Space Telescope is arguably the most valuable astronomical tool ever built! We use cookies to improve your experience. By continuing, you accept our use of cookies. Learn more.

Astronomy Beginner's Guide

Here are some of the jobs satellites do: Television Satellites send television signals directly to homes, but they also are the backbone of cable and network TV. Telephones Satellites provide in-flight phone communications on airplanes, and are often the main conduit of voice communication for rural areas and areas where phone lines are damaged after a disaster. Navigation Satellite-based navigation systems like the Navstar Global Positioning Systems known colloquially as GPS enable anyone with a handheld receiver to determine her location to within a few meters.

Safety Earth observation satellites can monitor ocean and wind currents as well as the extent of forest fires, oil spills, and airborne pollution; together this information helps organize emergency responders and environmental cleanup. Land stewardship Satellites can detect underground water and mineral sources; monitor the transfer of nutrients and contaminants from land into waterways; and measure land and water temperatures, the growth of algae in seas, and the erosion of topsoil from land. Development Satellites are increasingly important to the developing world.

Space science Before the Space Age, astrophysicists were limited to studying the universe via ground-based telescopes, and so could only use information from the parts of the electromagnetic spectrum that penetrated the Earth's atmosphere.

National Optical Astronomy Observatory

Dies liegt daran, dass die Erde von Westen nach Osten rotiert. Flare heisst auf Englisch rasch ansteigende und wieder abklingende Leuchterscheinung.


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