Solar System

Interplanetary Space : the whole solar system by volume appears to be an empty void. This vacuum of space comprises the inter planetary medium. It includes various forms of energy and at least two material components : Interplanetary dust and Interplanetary gas. Interplanetary dust consists of microscopic solid particles. Interplanetary gas is a tenuous flow of gas and charged particles mostly protons and electrons – plasma which stream from the sun, called solar wind. It also has a measurable effect on the motion of spacecraft, communication system on earth; electrical transmission etc.

The speed of the solar wind is about 400 kilometers per second in the vincity of the earth’s orbit. The point at which the solar wind meets the interstellar medium, which is the solar wind from other stars is called the heliopause. It is an imaginary boundary theorized to be roughly circular or teardrop – shaped , where the sun’s influence cease, at perhaps 100 AU from the sun. The space within the boundary of heliopause . The Solar magnetic field extends outward into the inter planetary space ; it can be measured on the earth and by spacecraft. The solar magnetic filed is dominating environment of planet which have their own magnetic filed. Kulper belt is a sic shaped region past the orbit of Neptune roughly 30 to 100 AU from the sun containing many small icy bodies.