Challenging Observing Projects for Amateur Astronomers
Includes 100 peculiar galaxies, off the beaten path, observing galaxy clusters, the Abell planetaries, and the ultimate observing list with images.

List of Common Deep Sky Catalogs
General, supernova remnants, planetary nebulae, diffuse nebulae, dark nebulae, open clusters, globular clusters, galaxies, clusters of galaxies, double stars, and references.

ROTL 2001
Radek's Observation Target List, a project to develop a comprehensive set of finder charts for deep-sky objects with basic data and charts to locate objects with a telescope.

Iiro's DeepSky Pages
General information, astronomical pictures, sketches, observation reports, objects, and telescope information.

Planetary Nebulae Observer's Web Site
Image index and gallery, observing tips, reports, filter information, data base, and links.

The NGC/IC Project
An attempt to correctly identify all the original objects, starting with the original discoverer's notes and working forward in time to encompass the work of contemporary astronomers, both professional and amateur.

The Messier Catalog
Images and galleries, marathoner list, and new nebula and supernovae.

Ian's Astro Page
Sketches, scratchings, pictures, and links, and construction of piggyback camera adaptor.

Impressions of the Deep Sky
Gallery of sketches, links, and sketches upload area..

Messier45
News, observing guide, references, download, deep sky maplet, list generator, other tools, and help guide.

Deep Sky Collections and Catalogs
Links to deep-sky catalogs and observing lists.

View-tah's Astronomy Pages - Deep Sky
Information, images, charts for the Messier, Caldwell, NGC, and Hubble with search tool.

Messier Marathon
Includes instructions, biography, dates, timeline, posters, NASA tv, and links and information.

A CCD Tour of the Universe
Includes deep sky objects and solar system ccd galleries, techniques and resources, and equipment.

Ray Cash's Deep-Sky Page
Articles, information, photos, and links about deep-sky observing.

Arp's Catalog Of Peculiar Galaxies
Summarizes catalog of 338 views gathered by Dr. Halton C. Arp.

Deep-Sky Org
Features a reference of Messier objects, telescope information, images, and deep-sky links.

The National Deep Sky Observers Society
Contains information, challenges, galaxy clusters, globular clusters, open star clusters, naked eye observations, observing planetary nebulae, the Milky Way, and star hopping.

Bangkok Deep-Sky Objects Observing
Contains observations, sketches, and information.

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

Secrets of Deep-Sky Observing
Pointers observers should know includes sky brightness, dark adaptation, averted vision, high power, capturing color, and other tips.

Deepsky Observer's Companion
Tutorials, chart index, discussions, certificates, and resources.

Visual Deep Sky Observing
Galleries of sketches, legend, projects, publications, and links.

Deep-Sky Objects through Telescopes
Drawings and sketches with information and links.

Astronomy Made Easy
Gear, autostar, astrophotos, LXD%% care, and links.

Amazing Astronomy Photos and Images
Galleries of solar system, cluster, nebula, and galaxy galleries.

Deep Sky Astronomy
Introduction, techniques, observations, sketches, comet and meteor observations, and links.

The Searchable Universe
Celestial object catalogs providing links to information.