The sun sends out a constant flow of charged particles called the solar wind. The solar wind is a gas of charged particles known as plasma, which ultimately travels past all the planets to some three times the distance to Pluto before being impeded by the interstellar medium. This forms a giant bubble around the sun and its planets, known as the heliosphere. This complex environment surrounds the planets and ultimately has a crucial effect on the formation, evolution, and destiny of planetary sy

The solar wind – a constant stream of... - NASA Sun Science

Solar Wind & Earth's Magnetic Field