ESO / ROBERT GENDLER / SCIENCE PHOTO LIBRARY ESO / ROBERT GENDLER / SCIENCE PHOTO LIBRARY
Orion Nebula, composite image. The larger patch (M42, NGC 1976) has a smaller neighbour (M43, NGC 1982) at upper left. These nebulae lie around 1500 light years away in the constellation of Orion. M42 and M43 are HII regions, areas of gas (mainly hydrogen) and dust where newly-born stars, including the three stars of the Trapezium, excite the gas and cause it to glow. The data includes observations from the European Southern Observatories.
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