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Credit: NASA/JPL-Caltech
Friday, Jan. 30, 2015: Star-forming features nicknamed "yellowballs" appear in the center of this image taken by NASA's Spitzer Space Telescope. The yellow…Read More »

balls form during the creation of massive stars before they carve out cavities in the surrounding gas and dust (appearing as green-rimmed bubbles with red interiors here). The yellow balls stretch several hundred to thousands of times the size of our solar system. Image released Jan. 27, 2015.

— Tom Chao    Less «
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