Galleries of sketches, legend, projects, publications, and links.

Information, images, charts for the Messier, Caldwell, NGC, and Hubble with search tool.

International society of amateur and professional astronomers specializing in the observation of deep sky objects. Includes a forum where members can communicate and publish the results of their observations.

Celestial object catalogs providing links to information.

Contains information, challenges, galaxy clusters, globular clusters, open star clusters, naked eye observations, observing planetary nebulae, the Milky Way, and star hopping.

Images and galleries, marathoner list, and new nebula and supernovae.

Math Heijen provides a collection of visual observing reports on stars, double stars and open clusters.

Pointers observers should know includes sky brightness, dark adaptation, averted vision, high power, capturing color, and other tips.

Articles, information, photos, and links about deep-sky observing.

The Internet Amateur Astronomers Catalog (IAAC), a mailing list for deep sky observers of all levels.

Observing guide, articles, Messier Gallery, Herschel 400 and Deep Sky Browser which allows the ability to search deep sky objects and view maps and images of over 600,000 objects.

General, supernova remnants, planetary nebulae, diffuse nebulae, dark nebulae, open clusters, globular clusters, galaxies, clusters of galaxies, double stars, and references.

A collection of my deepsky sketches and general information about deepsky objects and telesopes.

Sketches, scratchings, pictures, and links, and construction of piggyback camera adaptor.

Astronomical sketches of deep sky objects observed by Ferenc Lovro.

Wiki project aiming to help amateur astronomers in planning their observing sessions. Includes more than 4,000 articles describing the appearance of various deep sky objects in instruments of all sizes.

Tutorials, chart index, discussions, certificates, and resources.

Tutorials, chart index, discussions, certificates, and resources.

Deep sky object types and classifications. Includes a Messier interactive map, pictures, constellations and observation guide.

Article on various types of deep sky objects.

Includes 100 peculiar galaxies, off the beaten path, observing galaxy clusters, the Abell planetaries, and the ultimate observing list with images.

Sketches of astronomical objects made at the telescope by Michael Geldorp.

Provides images from the catalog of 338 peculiar galaxy views gathered by Dr. Halton C. Arp in his Atlas of Peculiar Galaxies.