Enormous catalogs

Through the ceiling catalogs are lists of deep sky objects that occupy a fixed position in the sky. They are very useful for amateur astronomers, because they collect the main galaxies, nebulae and star clusters that can be seen with a telescope medium.

In the best known are: Messier catalog: the most famous and the first to be published. He was drafted by the French astronomer Charles Messier in 1769. It brings together 110 objects numbered M1 to M110, in the order in which the Messier discovered while watching the skies for comets.

Meets only matter evident from the northern hemisphere. Catalog Caldwell was developed to complement the Messier catalog. Collect 109 objects numbered C1 to C109, in order of latitude from north to south. Includes objects in the southern hemisphere and other major northern hemisphere that do not appear in the Messier as the Hyades. Catalog Herschel 400: was created for use by amateur astronomers. Collect 400 items easy to see with a telescope environment. A selection of objects from the General Catalogue of Nebulae and Clusters of Stars, drawn in 1,864 by the English astronomer William Herschel. New General Catalogue: currently, along with Messier, catalog used to name objects in deep space. It was published in 1880 to update the general catalog of Herschel, and included all the objects known to date. NGC uses the acronym followed by the number of object. The current version includes more than 13,000 NGC objects.