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We are used to seeing the Milky Way in the optical. The band of light
is due to stars, with large blotches of dark, due to dust in the interstellar
medium.
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A near-infrared image shows the distribution of cool stars and hot dust.
This image
highlights the Bulge of our Galaxy because..?
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At far-infrared wavelengths, all we see is cold dust which is VERY closely concentrated to
the plane of the galaxy. It makes up a very flat
distribution in the picture.
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The radio reveals emission from Supernova Remnants!! And very local
ones, took, which appear to fill our entire sky. The "Northern Spur"
is seen in both Radio AND X-ray.
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Structures seen in the radio are similar to those seen in the
X-ray they come from Supernova remnants, which
have both radio and X-ray emission.
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