Google Cataloged Images: The Interactive NGC Catalog Online - This is the interactive NGC (and IC, and Messier) catalog at SEDS, based on the famous NGC 2000.0 by R.W. Sinnott of Sky Publishing Corp., who also created the electronic version used by this online service (thanks to Sky Publishing for permitting us this kind of use). Only some minor corrections have been included in our online database. The HTML interface and its features were created by Hartmut Frommert. Thanks to Bill Arnett for helpful hints and support, and the admins of SEDS who provided the appropriate hardware and software basis for this service. Astrophotography by Anthony Ayiomamitis --Messier Object Image Gallery Interactive Star Atlas     Object Catalogues: Messier     Object Catalogues: Deep Sky Messier Objects with Data - Homogenous data for all the Messier objects of their various types are plainly unavailable from professional sources, so our compilation is necessarily preliminary and far from being perfect, even if we completely disregard the generally poor availability of acurate distances. An amateur attempt was undertaken by Don Machholz, who determined apparent visual brightness (in magnitudes) and apparent diameters (in arc minutes) in his booklet, Messier Marathon Observer's Guide; look at his list. Image Index of NGC & Messier Planetary Nebulae Messier Objects From the Digitized Sky Survey Messier Objects Sketches by Bill Ferris Monthly Messier Star-Hops - The following series of monthly star-hops was written to cover all of the Messier objects. Its intended audience was beginners and less experienced amateur astronmers in the Atlanta Astronomy Club (AAC). All of these articles were originally published in the AAC's newsletter, "The Focal Point." All articles are copyright the author. However, individuals and amateur astronomy organizaitions may freely refer to them as desired. The Messier Catalog   (By Types) - During the years from 1758 to 1782 Charles Messier, a French astronomer (1730 - 1817), compiled a list of approximately 100 diffuse objects that were difficult to distinguish from comets through the telescopes of the day. Discovering comets was the way to make a name for yourself in astronomy in the 18th century -- Messier's aim was to catalog the objects that were often mistaken for comets. See Messier Marathon 2000 Deep Sky collections and catalogs similar to Messier's The Caldwell Catalog - The Caldwell Catalog is presented in order of descending declination (all positions are equinox 2000.0). For an observer at latitude X°; N, all C objects at declinations north of (X-90)°; will rise above the horizon at some time of year. Thus, for example, an observer in Boston (42.3°; N) has a shot at C1 through C80, but C81 through C109 are too far south. For planetary nebulae a size of, e.g., 0.3/2.2 means that the bright nucleus is 0.3' across while the faint outer shell spans 2.2'. William Herschel's Catalog of Deep Sky Objects - Almost all of Herschel's objects (even the non-existing, erroneous entries) have also obtained an NGC number; there are only four or five exceptions. The STScI Digitized Sky Survey comprises a set of all-sky photographic surveys in E, V, J, R, and N bands conducted with the Palomar and UK Schmidt telescopes. The Catalogs and Surveys Branch (CASB) is digitizing the photographic plates to support HST observing programs but also as a service to the astronomical community. Object Catalogue: Palomar Observatory Sky Survey Plates Object name Get coordinates from SIMBAD NED     © Copyright 2007 - Samuel J. Wormley   by swormley1@mchsi.com