Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  HD85161  ·  HD85458  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
M81, Paul Porto
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M81

M81, Paul Porto
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M81

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Description

The M81 galaxy from Bortle 1 skies at Kodachrome State Park, UT. Also known as Bode's Galaxy or NGC 3031, it is a spiral galaxy located in the constellation Ursa Major. 
  • Classification: M81 is classified as a grand design spiral galaxy. It has prominent spiral arms that extend out from its bright nucleus, giving it a striking appearance.
  • Distance: M81 is located approximately 12 million light-years away from Earth, making it one of the closest galaxies to us.
  • Size: The diameter of M81 is estimated to be around 90,000 light-years, making it slightly smaller than our Milky Way galaxy.
  • Active Galactic Nucleus: M81 has an active galactic nucleus (AGN), which means that there is a supermassive black hole at its center. This black hole is actively accreting matter, releasing a tremendous amount of energy and making M81 a strong source of radio waves.
  • Interactions with M82: M81 is gravitationally interacting with another nearby galaxy called M82 or the Cigar Galaxy. These interactions have caused both galaxies to undergo intense star formation, resulting in high levels of ultraviolet and infrared radiation.
  • Supernova discoveries: M81 has been a prolific producer of supernovae, with several of them being discovered within its boundaries. The most recent notable supernova, SN 2014J, was discovered in January 2014 and became one of the closest and brightest supernovae observed in recent years.
  • Galaxies in the vicinity: M81 is part of a group of galaxies known as the M81 Group or the Bode's Galaxy Group. This group consists of several other galaxies, including M82, NGC 2976, and NGC 3077.
  • Notable features: M81 has several notable features, including dust lanes, which can be seen as dark patches within its spiral arms. It also has a number of globular clusters, which are dense collections of stars orbiting around the galaxy.

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M81, Paul Porto

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