Linked from

The 10 pages that link to Neutral hydrogen, each with the reason it gives.

• Intergalactic mediumRelated: Neutral hydrogen produces the absorption lines used to map diffuse gas.

• Lyman-alpha forestRelated: Neutral hydrogen in intervening gas absorbs quasar light at the Lyman-alpha wavelength.

• Magellanic StreamRelated: Radio maps of neutral hydrogen first revealed the Stream’s long gas trail.

• Magellanic BridgeRelated: Radio observations map the Bridge’s extensive reservoir of neutral gas.

• M81 GroupRelated: Radio observations map vast hydrogen streams connecting several group galaxies.

• Five-hundred-meter Aperture Spherical TelescopeRelated: FAST can map hydrogen emission to study gas in the Milky Way and beyond.

• Kennicutt–Schmidt lawRelated: H I maps quantify the atomic gas included in total-gas versions of the law.

• High-velocity cloudNarrower topic: Its emission traces the gas that defines these clouds observationally.

• Lyman-alpha emitterRelated: Neutral hydrogen both emits Lyman-alpha photons and scatters them strongly.

• IC 342/Maffei GroupRelated: Radio mapping of neutral hydrogen can reveal obscured gas-rich galaxies in the group.