Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Of the few stars visible in the Swan Nebula , several have quite unusual colors and are hypothesized to be very young stars still shrouded by gas from the cloud that formed them . The Swan Nebula is quite large and massive as it contains roughly 1000 times the mass of our Sun . The bright central region is about 15 light years across lies about 5000 light years away toward the constellation of Sagittarius . The distinctive shape causes this region to have several other names, including the Omega Nebula, the Horseshoe Nebula, and the Lobster Nebula.
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