While Venus, strictly speaking, does not possess an intrinsic
magnetosphere, it has a significant interaction with the solar wind which
differs sufficiently from the analogous phenomenon at comets to warrant
inclusion under the planetary heading. In that area, I worked with our
late colleague Mordechai (Marks) Kovner on the question of particle
acceleration in the Cytherean environment (the adjective derived from Venus
has, alas, other connotations) and with Igor Rogachevski and Nathan Kleeorin
on the turbulent generation of flux ropes in the ionosphere of Venus.