What is meant by solar wind ?

Explanation

Solar wind is a stream of charged particles emitted by the sun some of which flow towards Earth.
Note : The charged particles emitted by the sun and those moving towards the Earth are trapped in the ionoshere and show helical motion before advancing towards the south pole and the north pole. These charged particles interact with `N_(2)` and `O_(2)` molecules and cause a spectacular display of colours in the sky at a heigh from 500 km to 650 km above the surface of the earth. These are called Auroras. (The one which is observed in Australia is called Aurora Australis and the one which is observed near Canada is called Aurora Borealis ) .