Until 1950’s our planet had only one satellite…with the launch of sputnik 1 our planet proudly able to say now it have two satellites…it was launched on 4th October of 1957…The satellite travelled at 29,000 kilometers per hour, taking 96.2 minutes to complete an orbit, and emitted radio signals at 20.005 and 40.002 MHz…though it had been burned up on re-entering Earth’s atmosphere on 4th January 1958, it still was a huge success in human expanding his kingdom outside the world….

1. Moon part – 2(sputnik 1)

Since then hundreds of satellites have been launched successfully and tens of them are now playing their role in helping the man kind in many of the ways….

Different types of satellites:

Satellites can be classified into five types…as…

  1. Communication satellites

  2. Research satellites

  3. Weather satellites

  4. Navigational satellites

Communication satellite provides a link up of radios, telephone, television, various communication channels across the world… first satellite of this kind was Echo 1 launched in 1960…but first active comm… Satellite was Telstar 1 which transmitted first live television broadcast across the Atlantic…

2.  The TELSTAR boy….

Coming to research satellites…Numerous satellites are orbited to observe the space environment of the Earth or to study the Sun, stars, and extragalactic objects over a wide range of wavelengths, gather meteorological data for scientific analysis …these all come under research satellites…Scientists use earth observation satellites to locate mineral deposits, to determine the location and size of freshwater supplies and to detect the spread of disease in crops and forests….

3.  Lowest operation of any research satellite

Weather satellites are one of the most important instrumentation used to predict the weather. The photos of these satellites locate weather features–storm systems, fronts, upper-level wind direction and speeds–that are characterized by certain cloud formations… As early as 1960, NASA launched Trios 1 the word stands for Television and Infrared Observation Satellite. One of the first benefits to come from this system was the classification of clouds according to brightness, formation, color, height, shape, and size….

4.  Report of weather satellite


Navigation satellites allow the operators of land vehicles, ships, and aircraft to determine their locations within 100 feet any where on earth. These vehicles all have on board a computerized receiver which can pick up radio signals from satellites miles in space. This enables the computers to pinpoint the vehicle’s location….

5.  Navigation satellites used for the safe travel

Scientific satellites are a necessity of life on earth today. They show us what other planets look like, where to find minerals and water, and they locate forest fires, ocean currents, and storms. Satellites are used for surveying land, and predicting weather. Without satellites, jet air travel would be a dangerous sport, and ships at sea would not be able to navigate so easily….

6.  Use of all the satellites

For video of latest communication satellite visit: