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Messier 81

Messier 81, also known as Bode's Galaxy, is a spiral galaxy about 12 million light-years away in the constellation Ursa Major. It is about half the size of the Milky Way, with a diameter of 90,000 light years. Discovered by Johann Elert Bode on December 31, 1774, it has been studied extensively by astronomers due to its proximity to Earth, large size, and active galactic nucleus. Messier 81 can be viewed easily using binoculars and small telescopes, and under exceptional viewing conditions can be seen with the naked eye. The center of the galaxy has a supermassive black hole with around 70 million times the mass of the Sun.

Photograph credit: Ken Crawford

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From Wikipedia, the free encyclopedia

Today's featured picture

Messier 81

Messier 81, also known as Bode's Galaxy, is a spiral galaxy about 12 million light-years away in the constellation Ursa Major. It is about half the size of the Milky Way, with a diameter of 90,000 light years. Discovered by Johann Elert Bode on December 31, 1774, it has been studied extensively by astronomers due to its proximity to Earth, large size, and active galactic nucleus. Messier 81 can be viewed easily using binoculars and small telescopes, and under exceptional viewing conditions can be seen with the naked eye. The center of the galaxy has a supermassive black hole with around 70 million times the mass of the Sun.

Photograph credit: Ken Crawford

Other areas of Wikipedia

  • Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
  • Help desk – Ask questions about using Wikipedia.
  • Local embassy – For Wikipedia-related communication in languages other than English.
  • Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
  • Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
  • Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.

Wikipedia's sister projects

Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects:

Wikipedia languages


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