Look at figure 15-6. Compare and contrast the two false-color images of the Milk

Question

Look at figure 15-6. Compare and contrast the two false-color images of the Milky Way Galaxy. Where is the cold dust located? The warm dust? Where can we say there is probably no dust?

Galactic plane Central bulge Magellanic Clouds Near-infrared Ophiuchus molecular clouds Galactic plane Taurus molecular clouds Galactic center molecular clouds Magellanic Clo Far-infrared AFigure 15-6 In these infrared images, the entire sky has been projected onto ovals with the center of the galaxy at their respective centers. The central plane of the Malky Way extends from left to right. (a) The central bulge is prominent at near-infrared wavelengths, but dust clouds block the view through the plane. (b) Interstellar dust emits blackbody radiation and glows brightly at longer wavelengths

Explanation / Answer

From the diagrams given the no dust area will be the north and south quadrant of the ellipse as interstellar dusts glow by blackbody radiation hence no dust space will appear black as seen in the above said quadrants.

cold dust is on the east and west sides of the galactic plane as they are faintly glowing.

but warm dust is at the bulge of the galactic plane where the glow is highest.

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