From the Latin 'nebula' (cloud), clouds of gas and dust among the stars, nebulae are both active nurseries and cemeteries of stars. These splendors of the sky are lit by the stars they contain or by the nearby stars located behind them. These are the most beautiful astronomy images that can currently be obtained. The nebulae allow us to admire in the field of the telescope marvelous agglomerations of stars and gases flooding the sky. Only long exposures will reveal the entire palette of colors, in particular the astonishing pink color of hydrogen.
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