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M51: Tidal Streams and H-alpha Ciffs
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M51: Tidal Streams and H-alpha Ciffs
Credit & Copyright: The Deep Sky Collective - Tim Schaeffer,
Carl Bjцrk, Steeve Body, Fabian Neyer, Aki Jain, Ryan Wierckx, Paul Kent, Brian Valente, Antoine & Dalia Grelin,
Nicolas Puig, Stephen Guberski, Mike Hamende, Julian Shapiro, John Dziuba, Mikhail Vasilev, Bogdan Borz, Adrien Keijzer
Explanation: An intriguing pair of interacting galaxies, M51 is the 51st entry in Charles Messier's famous catalog. Perhaps the original spiral nebula, the large galaxy with whirlpool-like spiral structure seen nearly face-on is also cataloged as NGC 5194. Its spiral arms and dust lanes sweep in front of its smaller companion galaxy, NGC 5195. Some 31 million light-years distant, within the boundaries of the well-trained constellation Canes Venatici, M51 looks faint and fuzzy to the eye in direct telescopic views. But this remarkably deep image shows off stunning details of the galaxy pair's striking colors and fainter tidal streams. The image includes extensive narrowband data to highlight a vast reddish cloud of ionized hydrogen gas recently discovered in the M51 system and known to some as the H-alpha cliffs. Foreground dust clouds in the Milky Way and distant background galaxies are captured in the wide-field view. A continuing collaboration of astro-imagers using telescopes on planet Earth assembled over 3 weeks of exposure time to create this evolving portrait of M51.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Русский текст
Based on Astronomy Picture Of the Day
Публикации с ключевыми словами: M 51 - спиральная галактика
Публикации со словами: M 51 - спиральная галактика
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