The Astrophysical Journal · 1965 · 1.3K citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsExtragalactic AstronomyStellar AstronomyCircumgalactic MediumH Ii RegionsInterstellar GasNeutral Hydrogen AbsorptionNeutral Hydrogen DistributionNeutral Hydrogen EmissionNeutral Hydrogen GasNeutral Hydrogen RegionsSpectroscopic DetectionSpectroscopic DiagnosticsSurvey Of Neutral Hydrogen
Density of neutral hydrogen in intergalactic space, using spectroscopic examination of quasi- stellar source 3C 9