There are four main types of telescopes. These include The Refracting Telescope, The Reflecting Telescope, Radio Telescopes, and X-ray and Gamma-ray telescopes. Each one works in a different manner.

NASA, which stands for National Aeronautics and Space Administration, is the civilian space program and for aeronautics and aerospace research in the United States of America. ISRO, on the other hand, is the...

Difference between full moon and new moon - A new moon occurs when the Moon is between the Earth and the Sun. A full moon occurs when the Moon is on the far side of the Earth from the Sun.