Space & PhysicsDiffuse NebulaeThe New Struve Wide-Slit Spectrograph Permits the Observation of the Faint Galactic NebulaeBy Henry Norris Russell on August 1, 1938AdvertisementABOUT THE AUTHOR(S)Recent Articles by Henry Norris RussellGalactic Gas CloudsAnthropocentrism's DemisePlanet Companions