Astro Science: Satellite and space study

Satellite A satellite is an object that has been intentionally placed into orbit of planets. Satellites are also called as artificial satellites as they are man made and can be distinguished from the natural satellites which are already present in the orbit of any planet naturally. What is the purpose of satellites? The purposes of satellites are: they can be used to make star maps and maps of planetary surfaces. they can also take pictures of that planet they are launched into. Satellites are usually semi-independent computer-systems .Satellite subsystems attend many tasks such as power generation,thermal control,telemetry,attitude control,scientific instrumentation,communication,etc. Types of satellites:- Astronomical satellites : these satellites are used to detect distant planets,galaxies and outer space objects. Biosatellites : these satellites are designed to convey living organisms, generally for scientific experimentation. Communication satellites : these satellites are station...

Indian space research organisation(ISRO) was established in 1962 by Jawaharlal Nehru(first prime minister of India) under the Department of Atomic Energy(DAE). The scientist who intiated the space research program was Dr.Vikram Ambalal Sarabhai.  Headquarter: Bengaluru, karnataka First satellite: Aryabhatta in 1975 launched by Soviet Union In 1980, ISRO launched Rohini which became the satellite to be placed in orbit by an Indian made launched vehicle,SLV-3. Then ISRO subsequently developed two other launch vehicles: GSLV (Geosynchronous Satellite Launch Vehicle) for placing satellites into geostationary orbits. PSLV(Polar Satellite Launch Vehicle) for placing satellites into polar orbits.       Then ISRO deployed satellite navigation system like GAGAN and IRNSS . In 2008, ISRO builts Chandrayan-1 to sent a lunar orbit,it launched on October 22 2008, which discovered lunar water in the form of ice. Then ISRO launched Mangalyaan-1 in 2014, which entered mars orbit...