Most common geostationary satellites are either weather satellites, communication satellites relaying signals between two or more ground stations and satellites that broadcast signals to a large area on the planet. The b... More » Science Astronomy

Artificial satellites are used for many purposes, including communications, navigation, gathering weather information, creating maps and even spying. Artificial satellites come in several forms, including telescopes and ... More » Science Astronomy

Although scientists use the term celestial body quite broadly, when they refer to a celestial body orbiting another body they are generally talking about natural satellites, or moons, orbiting a larger body such as a pla... More » Science Astronomy
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As of 2015, India has launched six major types of satellites into space: communication, Earth observation, navigation, experimental, small and student satellites. Scientific spacecrafts were also sent to space primarily ... More » Science Astronomy

Active satellites include the International Space Station and the Norwegian Coastal Administration's AISSat-2 low Earth orbit satellite, while active space probes include NASA's Voyager I and Voyager II probes, as of 201... More » Science Astronomy

As of 2015, there are 1,071 active, man-made satellites in orbit around Earth alone. In addition, there are two man-made satellites orbiting the moon; one each orbiting Mercury and Venus; three orbiting Mars; one orbitin... More » Science Astronomy

Math is used in astronomy to calculate routes for satellites, rockets and space probes. In addition, math is used in the global positioning system, for transmitting messages when data is compressed, and for coding the im... More » Science Astronomy