WordNet
n. interplanetary space including forms of energy and gas and dust
Wikipedia
The interplanetary medium is the material which fills the Solar System, and through which all the larger Solar System bodies, such as planets, dwarf planets, asteroids, and comets, move.
Usage examples of "interplanetary medium".
Friction with the thick interplanetary medium had almost circularized its path, and worked together with resonances to make this ever shorter.
Every one of these sentries continually endeavored, with a robot's mono-maniacal thoroughness, to probe every moving rock and ice ball that roamed into its assigned volume, every unusual variation in the ebb and flow of the tenuous interplanetary medium, fed by the solar wind.
This meant it was moving at a high fraction of the velocity of light, an impressive speed, considering how comparatively dense the interplanetary medium became in the inner system, fed by a constant outpouring of particles in the solar wind.
A hemispherical cage of superconducting wires looped over the crew module, partially shielding the crew against cosmic rays and other charged particles in the interplanetary medium—.
If they hadn't had their weapons hot they might be the ones currently enriching the interplanetary medium.
A hemispherical cage of superconducting wires looped over the crew module, partially shielding the crew against cosmic rays and other charged particles in the interplanetary medium–.