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Different types of photometric observations in the 1930s (Trumpler 1930; Stebbins et al 1 934; 1939) clearly showed that the dark "holes" in the Milky Way, observed by William Herschel almost 150
Role of grain size and particle velocity distribution in secondary electron emission in space plasmas
By virtue of being generally immersed in a plasma environment, cosmic dust is necessarily electrically charged. The fact that secondary emission plays an important role in determining the equilibrium
Dusty plasma effects in Saturn's magnetosphere
Comets, planetary rings, exposed dusty surfaces, and the zodiacal dust cloud are all examples of environments where dusty plasma effects establish the size and spatial distributions of small grains.
The electrostatics of a dusty plasma
We derive the potential distribution in a plasma containing dust grains where the Debye length can be larger or smaller than the average intergrain spacing. We treat three models for the grain-plasma
The comet Halley dust and gas environment
Quantitative descriptions of environments near the nucleus of comet P/Halley have been developed to support spacecraft and mission design for the flyby encounters in March, 1986. To summarize these
Negative ions in the coma of comet Halley
IN March 1986, the Giotto spacecraft encountered comet Halley, approaching to within ∼600 km of the nucleus. Results from this encounter have shown that the inner coma contains a mixture of cometary
Satellites and magnetospheres of the outer planets
The known properties of the satellites of the outer planets are reviewed and an attempt is made to provide explanations for some of the more striking features in terms of interaction with the
On the electrostatic charging of the cometary nucleus
The paper demonstrates that a water-dominated cometary nucleus is not shielded from solar UV radiation or solar wind by protective atmospheres beyond a heliocentric distance of 5 AU. It is also shown
The gravito‐electrodynamics of charged dust in planetary magnetospheres
The dynamics of small electrically charged dust grains within the rigidly corotating regions of planetary magnetospheres such as those of Jupiter and Saturn is considered. Depending on whether one is