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Double Cluster

The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. [1]

17 relations: Astronomy (magazine), Astronomy Picture of the Day, Blueshift, Caldwell catalogue, Cambridge University Press, Cassiopeia (constellation), Circumpolar star, Light-year, NGC 869, NGC 884, Open cluster, Perseids, Perseus (constellation), Pleiades, Radiant (meteor shower), Stellar classification, William Herschel.

Astronomy (magazine)

Astronomy is a monthly American magazine about astronomy.

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Astronomy Picture of the Day

Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU).

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Blueshift

A blueshift is any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift.

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Caldwell catalogue

The Caldwell Catalogue is an astronomical catalog of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.

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Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

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Cassiopeia (constellation)

Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty.

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Circumpolar star

A circumpolar star is a star that, as viewed from a given latitude on Earth, never sets (that is, never disappears below the horizon), due to its proximity to one of the celestial poles.

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Light-year

A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.

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NGC 869

NGC 869 is an open cluster located 7600 light years away in the constellation of Perseus.

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NGC 884

NGC 884 is an open cluster located 7600 light years away in the constellation of Perseus.

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Open cluster

An open cluster, also known as galactic cluster, is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.

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Perseids

The Perseids are a prolific meteor shower associated with the comet Swift–Tuttle.

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Perseus (constellation)

Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky.

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Pleiades

In astronomy, the Pleiades, or Seven Sisters (Messier 45 or M45), is an open star cluster containing middle-aged hot B-type stars located in the constellation of Taurus.

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Radiant (meteor shower)

The radiant or apparent radiant of a meteor shower is the point in the sky, from which (to a planetary observer) meteors appear to originate.

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Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

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William Herschel

Frederick William Herschel, KH, FRS (German: Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer, and brother of Caroline Herschel.

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Redirects here:

Caldwell 14, Double Cluster in Perseus, Double cluster, H & chi per, H and chi per, H and chi perseus.

References

[1] https://en.wikipedia.org/wiki/Double_Cluster

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