Astrophysics (Index)About

interplanetary medium

(matter in the solar system around and between planets)

The interplanetary medium (IPM) is matter such as dust, gas, and plasma (solar wind) within the solar system between planets. The density in the vicinity of Earth is about 5 particles per cubic centimeter. Given the electrically-conducting plasma, a magnetic field is maintained, forming a dynamo. Such dust is known as interplanetary dust particles (IDP).

Analogous matter between stars is called the interstellar medium and between galaxies, the intergalactic medium.

(gas,dust,solar system)
Further reading:

Referenced by pages:
cosmic dust
magnetohydrodynamics (MHD)
particle spectrometer
plasma frequency
presolar grain
stellar atmosphere