Galactic hydrogen distribution. Diagram showing the distribution of neutral hydrogen in the Milky Way. The darker the area on the diagram,the more dense the hydrogen. This shading shows a number of spiral arms and was the first attempt to map the spiral structure of our galaxy using observations of neutral hydrogen. Image from 'The Galactic System as a Spiral Nebula' by Jan Oort,Frank Kerr and Gart Westerhout,published in Reports on the Progress of Astronomy,No. 4 (1958) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Royal Astronomical Society |
Taille de l’image : | 2751 px × 3189 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |