Solar system
The discovery of the solar system was done by Nicolas Copernicus in 1543 . । 140 AD. Claudius Ptolemy said that the earth is in the center o...
Cosmic rays , universal rays
Cosmic rays are highly energetic particles .Cosmic rays was discovered by American physist victor hens in 1912.cosmic rays are generate i...
NIRBHYA Missile
Nirbhay is the long range Indian cruise subsonic missile it's developed by the defence research and development organisation we known as...
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