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Ring Crimson

Credit: NASA/JPL-Caltech
Thursday, Oct. 30, 2014: Galaxy NGC 1291, in the constellation of Eridanus, gleams with a ring of young stars circling it. This ring, colored red here,…Read More »

contains new stars igniting and heating up dust that glows with infrared light. In contrast, the stars in the center of the galaxy glow with shorter-wavelength infrared light colored blue. These stars have lived longer, having already consumed fuel for new stars. The galaxy is about 12 billion years old, and is classed as a barred galaxy, having a bar of stars in its center. In young, gas-rich galaxies, stellar bars force gas toward the center, promoting star formation. Over time, as star-making fuel runs out, the central regions quiet down, and star-formation activity migrates to the galaxy’s outskirts. Read the Full Story.

— Tom Chao   Less «
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