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M51 (NGC 5194 and NGC 5195, Whirlpool Galaxy) in continuum light


M51 (NGC 5194 and NGC 5195, Whirlpool Galaxy) in continuum light

M51 (also known as Whirlpool Galaxy) are two interacting galaxies in constellation Canes Venatici. The larger one (M51A or NGC 5194) is a grand-design spiral galaxy. Its smaller companion (M51B or NGC 5195) is a dwarf galaxy that is highly distorted from the interaction with M51A.

This image is without H-alpha. On my homepage it is possible to toggle between a second version with H-alpha and thus visualize the correlation between HII gas clouds and and blue regions (containing young stars and/or OIII gas and H-beta emissions).

It seems that M51A contains many young (bluish stars) while M51B and its tidal streams mainly consists in older (here brownish grey) stars. Furthermore it can be seen that the dust band of the upper arm of M51A obfuscates M51B, i.e. M51B lies behind M51A.



    Photo
    ETtheExtraterrestrial
    Nov 23 2021 12:57 PM
    That is a spectacular image. Thank you for sharing.



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