Massive stars forming in DR21

Numéro d’image : 11885407
Massive stars forming in DR21
Massive stars forming in nebula DR21,Spitzer Space Telescope image. DR21 is a region (centre,top) about 10,000 light years away in the constellation Cygnus. It is a bright source of radio emission,but heavy dust obscures all its light. Infrared cameras on Spitzer penetrate this,revealing a stellar nursery for stars up to 100,000 times as bright as the sun. There is a gaseous outflow from DR21 (green). The red filaments in the image glow because of polycyclic aromatic hydrocarbons (PAHs),which are excited into luminescence by radiation at wavelengths near 8 microns. Blue represents wavelengths of 3.6 microns,rising through green and orange to red at 8 microns
Licence : Droits gérés
Crédit: Science Photo Library / NASA
Taille de l’image : 4059 px × 2152 px
Model Release : Non requis
Property Release : Non requis
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