JASON WARE / SCIENCE PHOTO LIBRARY JASON WARE / SCIENCE PHOTO LIBRARY
Lagoon and Trifid nebulae. The Lagoon Nebula (M8, NGC 6523) is the larger nebula at centre, and has some dark nebulae crossing it. The Trifid Nebula (M20, NGC 6514) is the small nebula (red/blue) at upper right. These nebulae are found in the constellation of Sagittarius, near the Milky Way (brown, lower left). Nebulae are clouds of gas and dust in space, many light years across. They are called emission nebulae when the hydrogen gas is ionised, emitting red light. The hydrogen gas is ionised by nearby stars. Blue reflection nebulae reflect and scatter light. Nebulae contain the materials to form new stars and planets. Image taken with a Meade 12-inch Schmidt camera.
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