Nebula NGC 6559

Nebula NGC 6559

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Caption: Nebula NGC 6559. This cloud of dust, known as NGC 6559, is located about 5,000 light-years away, towards the centre of the Earth's Milky Way galaxy. At this distance the length of the cloud (diagonally across the image) is about 7 light-years. NGC 6559 is part of a larger star-forming region in the southern constellation Sagittarius. Hydrogen gas is glowing in red light due to ionisation from nearby stars. The dark structure that resembles a Chinese dragon is caused by cool dust absorbing background radiation from the hydrogen gas. Image obtained on the night of July 10, 2005, by the Gemini Multi-Object Spectrograph (GMOS), at the Gemini South Observatory, Chile.

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Keywords: 10 july, 10th july, 2005, 21st century, astronomical, astronomy, astrophysical, astrophysics, chinese dragon, clouds, composite, dust cloud, formation, gemini multi-object, gemini south observatory, gmos, hydrogen, interstellar, ionisation, ionization, milky way, nebula, nebulae, ngc 6559, ngc6559, optical, radiation, red, sagittarius, space, spectrograph, star, star forming, star-forming, stars, stellar, summer, telescope

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