Hydrogen clouds are regions of interstellar matter predominantly composed of hydrogen in a neutral state, rather than existing as ionized or molecular hydrogen. These clouds are a significant component of galaxies.
Composition and Characteristics
- Main Constituent: Primarily neutral hydrogen. This means the hydrogen atoms haven't lost their electrons (ionized) nor are they bonded together as molecules (molecular hydrogen).
- Interstellar Matter: Hydrogen clouds exist in the space between stars, contributing to the overall density and composition of the interstellar medium.
- Temperature: Relatively cold.
Significance
According to provided information, most of the matter between stars in the Milky Way, as well as other spiral galaxies, exists as relatively cold, neutral hydrogen gas.
Where are they found?
- Milky Way Galaxy: A major component of the interstellar medium within our own galaxy.
- Spiral Galaxies: Also commonly found in other galaxies of the spiral type.
