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A significant expansion of the catalog, Guide Star Catalog II, was published in 2008. The Guide Star Catalog II (GSC-II) was compiled by the Catalog and Surveys branch of the Space Telescope Science Institute and the astrometry team of the Astronomical Observatory of Torino (Italy). It has entries for 945,592,683 stars, and has positions ...
HSC — Hubble Source Catalog [21] (lists of sources from the Hubble Space Telescope) Hst — C.S. Hastings (double stars) Hu — Humason (planetary nebulae) Hu — W.J. Hussey (double stars) Hurt — Robert Hurt (for example: globular star cluster Hurt 2, aka 2MASS-GC02 in Sagittarius) Huygens — Christiaan Huygens (double stars) HV ...
It contains the twenty million stars of the Hubble GSC, version 1.1, recalibrated using the U.S. Naval Observatory's ACT (Astrographic Catalog/Tycho). By 2009 it was considered obsolete, superseded by such catalogues as GSC-2.2, B1.0, A2.0, and especially UCAC-3. [1] GSC-ACT was a re-calibration of the Guide Star Catalog version 1.1 for Hubble. [2]
The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope , but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy .
Hubble's Variable Nebula: Nebula: 2.5 Monoceros - C47 NGC 6934 Globular Cluster: 57 Delphinus: 8.9 C48 NGC 2775 Spiral Galaxy: 55,000 Cancer: 10.3 C49 NGC 2237: Rosette Nebula: Nebula: 4.9 Monoceros: 9.0 C50 NGC 2244: Satellite Cluster [9] Open Cluster: 4.9 Monoceros: 4.8 C51 IC 1613 Irregular galaxy: 2,300 Cetus: 9.3 C52 NGC 4697 Elliptical ...
The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. [4]It constitutes the visible portions of the Cygnus Loop, [5] a supernova remnant, many portions of which have acquired their own individual names and catalogue identifiers.