👉 Atmosteon, also known as "atmosphere of a comet," is a term used in astronomy to describe the dense and densest part of a comet's atmosphere. It is characterized by its high density and low temperature, which can make it difficult for spacecraft or other objects to travel through and observe it directly. Atmostons are typically thought of as being composed mostly of nitrogen and oxygen, with trace amounts of helium and argon. They are usually visible from space and can be seen