Massive stars forming in DR21

Massive stars forming in DR21

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Caption: 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.

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Keywords: astronomical, astronomy, astrophysical, astrophysics, carbon monoxide, composite, cosmological, cosmology, cygnus, dr21, from space, gaseous outflow, hidden, hydrocarbons, hydrogen, infrared, instellar wind, ir, luminescence, nursery, obscured, polycyclic aromatic, satellite image, spitzer space telescope, star, star formation, star forming, stars, stellar nursery, winds

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