outgasar

An outgassar is a celestial object that emits a significant amount of gas. This phenomenon is most commonly observed in young stars, particularly during their formation. As a protostar collapses under its own gravity, it often spins rapidly. This rotation can lead to the formation of a powerful bipolar outflow, where jets of gas are ejected from the star's poles. These jets are a form of outgassing and play a crucial role in regulating the star's growth and the surrounding environment.

Outgassing can also occur in other astronomical contexts. For instance, some comets exhibit substantial outgassing as they approach the Sun. The Sun's heat causes volatile materials like ice and dust on the comet's surface to sublimate, transforming directly into gas and forming the characteristic coma and tail. Similarly, certain moons in our solar system, such as Jupiter's moon Io, display volcanic activity that results in the expulsion of gases and particulate matter into space. The study of outgassing helps astronomers understand star formation, planetary evolution, and the composition of celestial bodies.