ABSTRACT
The roughly spherical, temporary atmosphere of gas and dust expelled from a comet's nucleus as a result of solar heating when the comet is sufficiently close to the Sun. The nucleus and coma are together known as the comet's head
The roughly spherical, temporary atmosphere of gas and dust expelled from a comet's nucleus as a result of solar heating when the comet is sufficiently close to the Sun. The nucleus and coma are together known as the comet's head