JOHN SANFORD / SCIENCE PHOTO LIBRARY JOHN SANFORD / SCIENCE PHOTO LIBRARY
Optical image of the Horsehead nebula (IC 434) in the constellation Orion. The smaller, more orange Flame nebula (NGC 2024) is at lower left. These nebulae are part of the Orion nebula complex, an enormous starbirth region some 1500 light years from Earth.
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