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  2. List of astronomical catalogues - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    Abel (globular star clusters) Abell — Abell catalogue; Abetti — Giorgio Abetti (double stars) Abt — (for example: open star cluster Abt 1 = Biurakan 4 = Markarian 6 = Stock 7) (at 2:29.6 / +60°39' near the southwestern section of the Heart Nebula in Cassiopeia) AC — Astrographic Catalogue; A.C. — Alvan Clark (double stars)

  3. Hertzsprung–Russell diagram - Wikipedia

    en.wikipedia.org/wiki/Hertzsprung–Russell_diagram

    In 1910 Hans Oswald Rosenberg published a diagram plotting the apparent magnitude of stars in the Pleiades cluster against the strengths of the calcium K line and two hydrogen Balmer lines. [3] These spectral lines serve as a proxy for the temperature of the star, an early form of spectral classification.

  4. Stellar isochrone - Wikipedia

    en.wikipedia.org/wiki/Stellar_isochrone

    One of the first uses of an isochrone method to date an open cluster was by Demarque and Larson in 1963. [3] If the initial mass function of the open cluster is known, isochrones can be calculated at any age by taking every star in the initial population, using numerical simulations to evolve it forwards to the desired age, and plotting the ...

  5. List of NGC objects (1–1000) - Wikipedia

    en.wikipedia.org/wiki/List_of_NGC_objects_(1–1000)

    The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies. Other objects in the catalogue can be found in the other subpages of the list of NGC objects . The constellation information in these tables is from The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer , [ 1 ...

  6. Star cluster - Wikipedia

    en.wikipedia.org/wiki/Star_cluster

    Scutum Star Cloud with open cluster Messier 11 at lower left. Technically not star clusters, star clouds are large groups of many stars within a galaxy, spread over very many light-years of space. Often they contain star clusters within them. The stars appear closely packed, but are not usually part of any structure. [17]

  7. List of nearby stellar associations and moving groups

    en.wikipedia.org/wiki/List_of_nearby_stellar...

    The regions with higher density of stars are shown; these correspond with known star clusters (Hyades and Coma Berenices) and moving groups. This is a list of nearby stellar associations and moving groups. A stellar association is a very loose star cluster, looser than an open cluster. A moving group is the remnant of such a stellar association ...

  8. List of NGC objects - Wikipedia

    en.wikipedia.org/wiki/List_of_NGC_objects

    It is one of the largest comprehensive astronomical catalogues for deep sky objects such as star clusters, nebulae, and galaxies. List of NGC objects (1–1000) List of NGC objects (1001–2000) List of NGC objects (2001–3000) List of NGC objects (3001–4000) List of NGC objects (4001–5000) List of NGC objects (5001–6000)

  9. NGC 3324 - Wikipedia

    en.wikipedia.org/wiki/NGC_3324

    NGC 3324 is an open cluster in the southern constellation Carina, located northwest of the Carina Nebula (NGC 3372) [3] [4] at a distance of 9,100 ly (2,800 pc) from Earth. [2] It is closely associated with the emission nebula IC 2599 , also known as Gum 31 . [ 5 ]

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