Abstract
In this lecture, problems and results on interplanetary matter will be discussed. As we know today, the space between the planets is not empty. It contains diffuse matter in the form of ionized gas — the interplanetary plasma — and in the form of small particles — the so-called interplanetary dust or smoke. The questions concerning the interplanetary plasma will be discussed in Dr. Lüst’s lecture whereas my topic will be mainly the interplanetary dust particles. But we shall see that it is impossible to separate distinctly these two aspects of the interplanetary medium from each other; therefore we cannot avoid touching on the problems of gas, but from a quite different point of view from that which Dr. Lüst will discuss.KeywordsDust ParticleSolar CoronaInflux RateInterplanetary SpaceInterplanetary MediumThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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