Ed Bianchina's Astronomy



Messier 109

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Messier 109
Messier 109 (also known as NGC 3992) is a barred spiral galaxy approximately 46 million light-years away in the constellation Ursa Major. Messier 109 was discovered by Pierre Méchain in 1781. A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in approximately half of all spiral galaxies. Bars generally affect both the motions of stars and interstellar gas within spiral galaxies and can affect spiral arms as well. Captured using: 9.25 SCT with 6.3 focal reducer Atlas Mount QHY8 Imaging Camera
Posted on November 29, 2009 Full Size| Slideshow