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An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. Astronomical catalogs are usually the result of an astronomical survey of some kind.
Richness: A cluster must have a minimum population of 50 members within a magnitude range of m 3 to m 3 +2 (where m 3 is the magnitude of the 3rd-brightest member of the cluster). To ensure a healthy margin of error, this criterion was not applied rigorously, and the final catalog included many clusters with fewer than fifty members (though ...
In 1999, cluster RDCS J0849+4452 (RX J0849+4452, RXJ0848.9+4452) was found at z=1.261 [43] [46] In 1995 and 2001, the cluster around 3C 294 was announced, at z=1.786 [65] In 1992, observations of the field of cluster Cl 0939+4713 found what appears to be a background cluster near a quasar, also in the background. The quasar was measured at z=2. ...
Globular cluster: Nearest globular cluster to the Earth. Also the first globular cluster known to have exoplanets (PSR B1620-26b) Messier 12: 74.4 [28] Messier 70: 68 [29] NGC 290: 66 [30] Open cluster: Messier 28: 60 [31] Globular cluster: Messier 18: 52.4 [32] Open cluster: The following notable star clusters are listed for the purpose of ...
List of most massive open clusters Cluster name Mass (M ☉); (Sun = 1) Galaxy Notes NGC 1569-B (4.4 ± 1.1) × 10 5 [13] NGC 1569: NGC 1569-A (3.3 ± 0.5) × 10 5 [14] NGC 1569: RMC 136: 8.7 × 10 4 [15] Large Magellanic Cloud: Contains the most massive known star R136a1 at 196 +34 −27 M ☉. [16] NGC 346: 5 × 10 4 [17] Small Magellanic ...
The Milky Way. Population II stars are in the galactic bulge and globular clusters. Artist’s impression of a field of population III stars 100 million years after the Big Bang. Population II, or metal-poor, stars are those with relatively little of the elements heavier than helium. These objects were formed during an earlier time of the universe.
Tonantzintla, Mexico Observatorio Solar Carl Sagan: 2000 Hermosillo, Sonora, Mexico Observatory House (defunct) 1789 Slough, UK Observatory of the rue Serpente (defunct) 1890–1968 Paris, France Oil Region Astronomical Observatory: Venango County, Pennsylvania, US Onan Observatory: 1990 Norwood Young America, Minnesota, US
This is a list of open clusters located in the Milky Way. An open cluster is an association of up to a few thousand stars that all formed from the same giant molecular cloud . There are over 1,000 known open clusters in the Milky Way galaxy, but the actual total may be up to ten times higher. [ 1 ]