NASA news: ‘Space butterfly’ DISCOVERY stuns with beautiful nursery of ‘baby stars’
NASA said: “The W40 star-forming region was observed as part of a Spitzer Legacy Survey and the resulting mosaic image was published as part of the MYStIX, Massive Young stellar clusters Study in Infrared X-rays, survey of young stellar objects.
“The Spitzer picture is composed of four images taken with the telescope’s Infrared Array Camera, IRAC, in different wavelengths of infrared light: 3.6, 4.5, 5.8 and 8.0 micrometres, shown as blue, green, orange and red.
“Organic molecules made of carbon and hydrogen, called polycyclic aromatic hydrocarbons, PAHs, are excited by interstellar radiation and become luminescent at wavelengths near 8.0 microns, giving the nebula its reddish features.”
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