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  2. ConstellationTriangulum
    Right ascension01ʰ 33ᵐ 50.02ˢ

    Triangulum Galaxy - Wikipedia

    • The magnitude of the object matches M33, so it is most likely a reference to the Triangulum Galaxy. [19] The galaxy was independently discovered by Charles Messier on the night of August 25–26, 1764. It was published in his Catalog of Nebulae and Star Clusters (1771) as object number 33; hence the name M33. [20]… See more

    Discover the Triangulum Galaxy!
    Discover the Triangulum Galaxy!
     A Cosmic Wonder
    A Cosmic Wonder
    Overview

    The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC (New General Catalogue) 598. With the D25 isophotal diameter o… See more

    Etymology

    The galaxy gets its name from the constellation Triangulum, where it can be spotted.
    It is sometimes informally referred to as the "Pinwheel Galaxy" by some astronomy references… See more

    Visibility

    Under exceptionally good viewing conditions with no light pollution, the Triangulum Galaxy can be seen by some people with the fully dark-adapted naked eye; to those viewers, it is the farthest permanent … See more

    Observation history

    The Triangulum Galaxy was probably discovered by the Italian astronomer Giovanni Battista Hodierna before 1654. In his work De systemate orbis cometici; deque admirandis coeli caracteribus ("About the system… See more

    Properties

    The Triangulum Galaxy is the third largest member of the Local Group of galaxies. It has a diameter measured through the D25 standard - the isophote where the surface brightness of the galaxy reaches 25 mag/arcse… See more

    Further reading

    Hodge, Paul (2012). The Spiral Galaxy M33. Astrophysics and Space Science Library. Vol. 379. Springer Science+Business Media. doi:10.1007/978-94-007-2025-1. ISBN 978-94-007-2024-4. OCLC 757338008. See more

     
  1. Messier 33 (The Triangulum Galaxy) - NASA Science

    NGC 604 is an enormous star-forming nebula in one of M33’s spiral arms. Spanning almost 1,500 light-years, NGC 604 is nearly 100 times larger than the Orion Nebula in our own galaxy and contains more than 200 hot, massive, …

  2. M33: Facts About the Triangulum Galaxy | Space

    Apr 22, 2014 · The Triangulum Galaxy (M33) that is about 3 million light-years away from Earth. Among its most distinctive features are ionized hydrogen clouds, which are massive regions of starbirth.

  3. Messier 33: Triangulum Galaxy - Messier Objects

  4. Hidden Nebulae of M33 in 211 Hours - Sky & Telescope

    Dec 5, 2023 · The image reveals the Triangulum Galaxy in unprecedented detail, with 211 hours of exposure time, capturing the vast array of stellar birth and death. Messier 33 lies almost 2.7 million light years away from us in the …

  5. M33’s Cosmic Secret: No Black Hole, Just Stars

  6. The Triangulum Galaxy | Second Nearest Spiral Galaxy …

    The Triangulum Galaxy (M33) is a spiral galaxy in the constellation Triangulum, that is believed to be a satellite of the Andromeda Galaxy. Messier 33 can be seen visually with the naked eye under exceptionally good seeing conditions …

  7. Messier 33 - The Triangulum Galaxy - Universe Today

    Jan 30, 2017 · The Triangulum Galaxy (M33), taken by the Swift Gamma-Ray Burst Mission. Credit: NASA/Swift. It has a spectrum similar to the Orion Nebula – our own Milky Way’s most celebrated starbirth...

  8. NGC 604 – Nebula in M33 Triangulum Galaxy - Science@NASA

  9. Triangulum galaxy is 2nd-closest to Milky Way - EarthSky

    Oct 24, 2023 · Also known as M33, it’s the 2nd-closest large spiral galaxy to our Milky Way at some 2.73 million light-years from Earth. Makrem wrote: “In collaboration with Hédi Balma, we undertook the ...