Creating the billows.
The bright star at the center of this image is Eta Carinae, one of the most massive stars in the Milky Way galaxy. With around 100 times the mass of the Sun and at least 1 million times the brightness, Eta Carinae releases a tremendous outflow of energy that has eroded the surrounding nebula. Spitzer's infrared vision lets us see the dust, shown in red, as well as clouds of hot, glowing gas, which appear green.
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All the sixteen images on the NASA site looks very magical. Ah, the wonders all around us.