Effects of solar wind – Some planets have atmosphere whereas others don’t

# As the solar wind approaches a planet that has a well-developed magnetic field (such as Earth, Jupiter and Saturn), the particles are deflected.

# This region, known as the magnetosphere, causes the particles to travel around the planet rather than bombarding the atmosphere or surface.

# The magnetosphere is roughly shaped like a hemisphere on the side facing the Sun, then is drawn out in a long trail on the opposite side.
The boundary of this region is called the magnetopause, and some of the particles are able to penetrate the magnetosphere through this region by partial reconnection of the magnetic field lines.

# The solar wind is responsible for the overall shape of Earth’s magnetosphere.

# Moreover, planets with a weak or non-existent magnetosphere are subject to atmospheric stripping by the solar wind.

# Venus, the nearest and most similar planet to Earth in the Solar System, has an atmosphere 100 times denser than our own, with little or no geomagnetic field. This is a strange exception.