• Thumbnail for Double Cluster
    The Double Cluster (also known as Caldwell 14) consists of the open clusters NGC 869 and NGC 884 (often designated h Persei and χ (chi) Persei, respectively)...
    9 KB (944 words) - 21:52, 24 February 2024
  • Thumbnail for Open cluster
    astronomer Ptolemy mentions the Praesepe cluster, the Double Cluster in Perseus, the Coma Star Cluster and the Ptolemy Cluster, while the Persian astronomer Al-Sufi...
    52 KB (6,312 words) - 21:06, 11 September 2024
  • Thumbnail for Perseus (constellation)
    Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient...
    45 KB (5,209 words) - 14:23, 17 August 2024
  • Thumbnail for Star cluster
    Star clusters are large groups of stars held together by self-gravitation. Two main types of star clusters can be distinguished. Globular clusters are...
    23 KB (2,681 words) - 03:02, 16 September 2024
  • Thumbnail for NGC 884
    NGC 884 (category Open clusters)
    Persei) is an open cluster located 7640 light years away in the constellation of Perseus. It is the easternmost of the Double Cluster with NGC 869. NGC...
    4 KB (426 words) - 20:48, 24 February 2024
  • Thumbnail for Computer cluster
    computer cluster is a set of computers that work together so that they can be viewed as a single system. Unlike grid computers, computer clusters have each...
    34 KB (3,745 words) - 09:28, 4 September 2024
  • Thumbnail for NGC 869
    NGC 869 (category Open clusters)
    cluster located 7460 light years away in the constellation of Perseus. The cluster is about 14 million years old. It is the westernmost of the Double...
    4 KB (364 words) - 16:37, 26 July 2024
  • Thumbnail for Caldwell catalogue
    many of the sky's brightest deep-sky objects, such as the Hyades, the Double Cluster (NGC 869 and NGC 884), and the Sculptor Galaxy (NGC 253). The Messier...
    33 KB (740 words) - 00:17, 23 August 2024
  • Thumbnail for Perseus
    variable star Algol and some deep sky objects such as Messier 34, the Double Cluster, the California Nebula, and the Little Dumbbell Nebula (Messier 76)...
    36 KB (3,676 words) - 14:38, 1 October 2024
  • Thumbnail for List of galaxy groups and clusters
    groups and galaxy clusters. Defining the limits of galaxy clusters is imprecise as many clusters are still forming. In particular, clusters close to the Milky...
    50 KB (2,634 words) - 19:06, 3 August 2024
  • Thumbnail for Perseus Arm
    Double Cluster and a number of Messier objects: The Crab Nebula (M1) Open Cluster M36 Open Cluster M37 Open Cluster M38 Open Cluster M52 Open Cluster...
    5 KB (519 words) - 01:15, 13 June 2024
  • Thumbnail for Oak leaf cluster
    An oak leaf cluster is a ribbon device to denote preceding decorations and awards consisting of a miniature bronze or silver twig of four oak leaves with...
    15 KB (1,017 words) - 00:13, 7 February 2024
  • Cluster algebras are a class of commutative rings introduced by Fomin and Zelevinsky (2002, 2003, 2007). A cluster algebra of rank n is an integral domain...
    13 KB (2,413 words) - 01:38, 15 September 2023
  • Double-spending is the unauthorized production and spending of money, either digital or conventional. It represents a monetary design problem: a good money...
    8 KB (975 words) - 02:35, 2 August 2024
  • Thumbnail for Cluster II (spacecraft)
    Space Administration/ESA Double Star mission operated alongside Cluster II from 2004 to 2007. The first of the satellites of Cluster II to re-enter the atmosphere...
    144 KB (12,924 words) - 22:54, 29 September 2024
  • reference, which is not size-consistent, at the CCSDT (coupled cluster single-double-triple) level of theory, which provides an almost exact, full-CI-quality...
    28 KB (4,353 words) - 18:46, 19 July 2024
  • sites in the lip, oral cavity and pharynx ICD-10 code Caldwell 14, the Double Cluster in the constellation Perseus Autovía C-14, a highway in Catalonia in...
    1 KB (238 words) - 21:42, 12 November 2023
  • Thumbnail for Red supergiant
    Philip (2002). "The Star Formation History and Mass Function of the Double Cluster h and χ Persei". The Astrophysical Journal. 576 (2): 880–893. arXiv:astro-ph/0205130...
    33 KB (4,233 words) - 03:21, 23 July 2024
  • Thumbnail for Andromeda (constellation)
    2000, p. 132. Staal 1988, pp. 7–14, 17. "The Andromeda Galaxy and the Double Cluster in al-Sufi's Book of the Fixed Stars". Ian Ridpath's Star Tales. Retrieved...
    49 KB (4,911 words) - 17:57, 6 July 2024
  • Thumbnail for Messier 15
    100,000 stars, the cluster is notable for containing a large number of variable stars (112) and pulsars (8), including one double neutron star system...
    11 KB (991 words) - 06:50, 23 August 2024
  • Thumbnail for NGC 3532
    known as the Pincushion Cluster, Football Cluster, the Black Arrow Cluster, or the Wishing Well Cluster, is an open cluster some 405 parsecs from Earth...
    8 KB (622 words) - 00:19, 23 August 2024
  • Thumbnail for Trapezium Cluster
    dispersion of the stars of the cluster. One of the components of the cluster (Theta1 Orionis F, lower left) is a double star. The Chandra X-ray Observatory...
    9 KB (847 words) - 08:10, 27 June 2024
  • Thumbnail for S Persei
    S Persei (category Double stars)
    is a red supergiant or hypergiant located near the Double Cluster in Perseus, north of the cluster NGC 869. It is a member of the Perseus OB1 association...
    16 KB (1,627 words) - 13:23, 29 August 2024
  • Thumbnail for Gene cluster
    A gene family is a set of homologous genes within one organism. A gene cluster is a group of two or more genes found within an organism's DNA that encode...
    16 KB (1,918 words) - 23:54, 20 September 2024
  • Thumbnail for C/2017 T2 (PanSTARRS)
    and Messier 82 on May 22, 2020 C/2017 T2 (centre) passing near the Double Cluster on January 23, 2020 Horizons output. "Barycentric Osculating Orbital...
    6 KB (574 words) - 01:24, 4 November 2023
  • A tone cluster is a musical chord comprising at least three adjacent tones in a scale. Prototypical tone clusters are based on the chromatic scale and...
    83 KB (10,411 words) - 17:03, 5 September 2024
  • Thumbnail for XX Persei
    variable red supergiant star in the constellation Perseus, between the Double Cluster and the border with Andromeda. XX Persei is a semiregular variable star...
    10 KB (869 words) - 02:22, 8 September 2024
  • Nanocluster (redirect from Atom cluster)
    ionized cluster of metals. Cluster ion beams are produced by bombarding the surface with high energetic inert gas (krypton and xenon) ions. The cluster production...
    35 KB (4,240 words) - 21:53, 7 September 2024
  • Thumbnail for List of Abell clusters
    1086/159092. ESO-A Galactic Crash Investigation NASA: Hubble Views a Double Cluster of Glowing Galaxies Abell's 1958 paper and catalog Abell, Corwin and...
    19 KB (281 words) - 20:39, 2 December 2023
  • Thumbnail for Messier 103
    the cluster, another magnitude 10.8 red giant. Another bright foreground object is the double star Struve 131, but is not a member of the cluster. Cluster...
    6 KB (603 words) - 10:20, 27 May 2024