Energy & Green Tech
A trio of researchers at École Polytechnique Fédérale de Lausanne has found that solar panels could provide a lot more power for Switzerland than has been previously thought. In their paper published in Proceedings of ...
Telecom
Engineering researchers have developed a method to use signals broadcast by Starlink internet service satellites to accurately locate a position here on Earth, much like GPS does. It is the first time the Starlink system ...
Sep 23, 2021
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Other
It has been 10 years since Malaysia Airlines passenger flight MH370 disappeared on March 8 2014. To this day it remains one of the biggest aviation mysteries globally.
Mar 5, 2024
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Engineering
The first guy on Earth who ever got lost probably said to himself, "I could really use a set of geographic coordinates expressed as latitude and longitude right about now." Time passed, neocortexes evolved, and eventually, ...
Engineering
The joint research team of Electrical Engineering and Computer Science Professor JeongHo Kwak at the DGIST and Aerospace Engineering Professor Jihwan Choi at the KAIST have proposed a novel network slicing planning and handover ...
Jul 6, 2023
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26
Telecom
Amazon launched the first test satellites for its planned internet service on Friday as a rival to SpaceX's broadband network.
Oct 7, 2023
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31
Energy & Green Tech
Researchers at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) created a solar cell with a record 39.5% efficiency under 1-sun global illumination. This is the highest efficiency solar cell of ...
May 19, 2022
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Telecom
Clouds have been objects of reverie and wonder throughout human history, inspiring art and imagination, and of course warning of extreme weather events.
Nov 5, 2021
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24
Telecom
Two research teams, one led by Professor Jeongho Kwak of the Department of Electrical Engineering and Computer Science at DGIST (President Kuk Yang) and the other by Professor Jihwan Choi of the Department of Aerospace Engineering ...
Oct 20, 2022
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23
Internet
In recent months, people have reported seeing a parade of star-like points passing across the night sky. The formation is not extraterrestrial, or even astrophysical in origin, but is in fact a line of satellites, recently ...
Jun 11, 2021
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In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon.
The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957. By 2009 thousands of satellites have been launched into orbit around the Earth. These originate from more than 50 countries and have used the satellite launching capabilities of ten nations. A few hundred satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Venus, Mars, Jupiter and Saturn.
Satellites are used for a large number of purposes. Common types include military (spy) and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.
Satellites are usually semi-independent computer controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.
This text uses material from Wikipedia, licensed under CC BY-SA
