highhydrogen
Highhydrogen is a term used in informal or speculative contexts to denote substances, atmospheres, or mixtures with unusually high hydrogen content. It is not a single, widely recognized scientific category, but rather a descriptor used across disciplines to indicate an elevated hydrogen fraction.
In chemistry and materials science, highhydrogen or hydrogen-rich materials refer to compounds with high hydrogen-to-host-atom ratios,
In astronomy, regions or objects described as hydrogen-rich have an elevated abundance of hydrogen relative to
Hydrogen-rich atmospheres also characterize many exoplanets, notably gas giants and some sub-Neptunes, where molecular hydrogen (H2)
Safety and terminology: because hydrogen is highly flammable and forms energetic mixtures with oxygen, highhydrogen systems