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M51
M51 in Ha, OIII and Blue, The famous Whirlpool galaxy M51 was one of Charles Messier's original discoveries. He discovered it on October 13, 1773, when observing a comet, and described it as a "very faint nebula, without stars" which is difficult to see. Its companion, NGC 5195, was discovered in 1781 by his friend, Pierre M??chain, so that it is mentioned in Messier's 1784 catalog: 'It is double, each has a bright center, which are separated 4'35".  The two atmospheres touch each other, the one is even fainter than the other.' NGC 5195 was also recorded by William Herschel, who assigned it the number H I.186.
Link-words: Messier Galaxy

M51

M51 in Ha, OIII and Blue, The famous Whirlpool galaxy M51 was one of Charles Messier's original discoveries. He discovered it on October 13, 1773, when observing a comet, and described it as a "very faint nebula, without stars" which is difficult to see. Its companion, NGC 5195, was discovered in 1781 by his friend, Pierre M??chain, so that it is mentioned in Messier's 1784 catalog: 'It is double, each has a bright center, which are separated 4'35". The two atmospheres touch each other, the one is even fainter than the other.' NGC 5195 was also recorded by William Herschel, who assigned it the number H I.186.

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File information
Filename:CS_M51_Colour_2005Final.jpg
Album name:CSuddell / Messier Objects
Rating (3 votes):33333
Link-words:Messier / Galaxy
Image date, time and location:April 2005
Telescope aperture and focal ratio:Meade LX90 at F3.3 with 50x1sec blue, 20x20sec OIII and 20x30sec Ha stacked in AIP4WIN, aligned in Stalla Magic and RGB stacked in Registax and finished in Photoshop.
Filesize:35 KiB
Date added:May 07, 2005
Dimensions:400 x 325 pixels
Displayed:583 times
URL:http://gallery.orpington-astronomy.org.uk/displayimage-159-_M51_.html
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