On October 4th 1957, the first artificial satellite – Sputnik 1- was launched into low Earth orbit as a part of Soviet space program.

Everyone has heard of moons.Satellites are objects that orbit the planets.It is as natural as the moon and has artificial satellites like ISS and Insat.Small objects orbiting large objects are commonly called moons. Similarly, smaller galaxies orbiting larger galaxies are...

Why the night looks black. Have you thought of anyone? For dark skies, space has a reason. Although many have asked about it, in 1823 a scientist named heinrich olbers also thought more about. There were two types of cosmology...

We know the speed of light. Einstein found a limit to his theory of special relativity.But what is the maximum speed of sound? The speed of sound depends on its medium. It is a mechanical wave. Vibration in the medium...