In a broad sense, interplanetary space refers to the space where any planetary system is located.
The interplanetary space is defined by the solar wind. The continuous charged particles from the sun create a thin atmosphere (called the solar sphere), which goes into space for billions of miles.The particle density in the wind is 5-10proton/Cm, and moving at a speed of 350-400km/s[4]。The distance and intensity of the solar circle are closely related to the degree of solar wind activity[5]。Discovered since 1995ExoplanetIt means that other stars have the ability to own their own interplanetary medium[6]。In interplanetary space, the environment of the Milky Way began to affect the particle flow accompanied by the solar magnetic field, and became dominant beyond the solar magnetic field.
Interplanetary space contains magnetic fields generated by the sun[4]There are also magnetic fields generated by planets, such as the magnetic fields of Jupiter, Saturn and the Earth itself.Their shapes are affected by the solar wind, and similar to the shape of tears, they have a long magnetic tail stretching behind the planet.These magnetic fields can capture particles from the solar wind and other sources, creatingVan Allen beltMagnetic particle tape.Planets without magnetic field, such as Mars and Mercury, except Venus, whose atmosphere is gradually eroded by the solar wind.
