Write about artificial satellites pictures
Apart from those in sun-synchronous orbitfew satellites are launched into retrograde orbit because the quantity of fuel required to launch them is much greater than for a prograde orbit.
Centric classifications[ edit ] Galactocentric orbit : An orbit around the centre of a galaxy. Artificial satellites are used to study the Earth, other planets, to help us communicate, and even to observe the distant Universe. Also known as an intermediate circular orbit.
Such an orbit can place a satellite in constant sunlight and is useful for imagingspyand weather satellites. The first satellite, Sputnik 1was put into orbit around Earth and was therefore in geocentric orbit. Sizes and altitudes of satellites Satellites vary in size.
Names of artificial satellites
Since then, dozens of countries have launched satellites, with more than 3, currently operating spacecraft going around the Earth. Satellites are built by various aerospace companies, like Boeing or Lockheed, and then delivered to a launch facility, such as Cape Canaveral. This is because when the rocket starts out on the ground, it already has an eastward component of velocity equal to the rotational velocity of the planet at its launch latitude. Apart from those in sun-synchronous orbit , few satellites are launched into retrograde orbit because the quantity of fuel required to launch them is much greater than for a prograde orbit. A propulsion system — a rocket engine on the satellite may be used to help place the satellite into the correct orbit. Learn about this work here. Some communication satellites are about 7 m long and have solar panels that extend another 50 m. Artificial satellites can have a range of missions, including scientific research, weather observation, military support, navigation, Earth imaging, and communications. You can get more information about satellites from NASA.
Equipment on a satellite is hardened to survive in the radiation and vacuum of space. First launch by country.
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