@William Barton
Site messing up...
Do not need an atmosphere to have hydrogen.
Again the most abundant element in space is hydrogen.
Hydrogen is the most abundant element in the universe.
Hydrogen accounts for approximately
73–75% of all atoms in the universe, making it the dominant element by number, while helium follows with about
23–25% of atoms. This abundance originates from
Big Bang nucleosynthesis, which occurred within the first few minutes after the Big Bang, producing mostly hydrogen and helium nuclei Hydrogen’s simplicity, consisting of a single proton and electron, allowed it to form more readily than heavier elements
Role of Hydrogen in the Universe
Hydrogen is essential for
star formation, as it fuels nuclear fusion in stellar cores, producing helium and releasing energy that powers stars. It is also a key component of
water (H₂O) and organic molecules, making it fundamental to the chemistry of planets and life. Hydrogen is found in
stars, gas clouds, and gas giant planets like Jupiter and Saturn, which are primarily composed of hydrogen and helium.
Summary
Hydrogen’s overwhelming abundance shapes the structure and evolution of the universe. Its presence in stars, interstellar gas, and planets underpins both cosmic energy production and the chemical foundation for life, while helium and other heavier elements play supporting roles in the universe’s composition