interplanetary medium

Material which fills the Solar System

EntitymaterialQ1118875

Instance of: material

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From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The interplanetary medium (IPM) or interplanetary space consists of the mass and energy which fills the Solar System, and through which all the larger Solar System bodies, such as planets, dwarf planets, asteroids, and comets, move. The IPM stops at the heliopause, outside of which the interstellar medium begins. Before 1950, interplanetary space was widely considered to either be an empty vacuum, or consisting of "aether".

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Source last edited October 31, 2026. AIDb refreshes this page daily.

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AIDb. (2026). interplanetary medium (Q1118875). Retrieved from https://aidb.si/e/interplanetary-medium-Q1118875