Ground-based observations and in-situ measurements of the gas activities and coma structures of comet Halley have yielded many new insights to the expansion of atmospheric gas from the central nucleus. The first impression from these results is discussed in terms of present theoretical understanding of the different gas phenomena in the inner coma (r ≲ 104 km). The need for developing a new generation of theoretical models capable of describing the observed highly anisotropic coma activities with spin-modulation in the outgassing rate as well as short-term outbursts is stressed.
|Number of pages||13|
|Journal||Advances in Space Research|
|State||Published - 1985|