GERARD LODRIGUSS / SCIENCE PHOTO LIBRARY GERARD LODRIGUSS / SCIENCE PHOTO LIBRARY
Barnard 142 and Barnard 143 are a pair of dark nebulae in Aquila in a rich summer Milky Way star field. B142 is in the center of the frame, and B143 lies below and to the right of it. Dark nebula are clouds of non-luminous dust and gas in space that obscure the stars behind them. The distance to Barnard 142 is estimated to be about 2,000 light years. They are located about 3 degrees northwest of Altair, one of the stars in the Summer Triangle. B142 and B143 get their names from Edwin Emerson Barnard's famous list of dark nebulae that he published in a paper in 1919 in the Astrophysical Journal, On the Dark Markings of the Sky with a Catalogue of 182 such Objects.
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