Heliumrich
Heliumrich is a term used to describe a substance, environment, or object that contains a high proportion of helium relative to other constituents. The expression is not a formal scientific designation but a descriptive label applied across several fields to indicate elevated helium content.
In gas mixtures, helium-rich compositions are used for inerting, leak testing, cryogenics, and certain welding processes.
In astronomy, helium-rich atmospheres appear in some classes of stars, notably hot helium-rich subdwarfs and white
In planetary science, helium is a major constituent of the outer atmospheres of gas giants, though the