Catalog and Image Databases and Archives

Adventures in Deep Space Visual challenges for large apertures; great place to find photographic fields of interest
Aladin Sky Atlas (The) An interactive sky atlas (Java based) using various professional sky surveys
American Association of Variable Star Observers (AAVSO) Variable star observation/analysis/reporting
Association of Lunar and Planetary Observers (ALPO) High quality (mostly visual) solar system observations
Astronomical Data Center Professional level Astronomical Catalogs
Atlas of Peculiar Galaxies Dr. Halton C. Arp's atlas of peculiar galaxies, from the California Institute of Technology
Bright Supernovae Check for present observable Supernovae (maintained by David Bishop)
CDS Service for astronomical Catalogs (The) Strasbourg astronomical Data Center collection of data catalogs
Cosmic Voyage, The Online Resource for Amateur Astronomers Neat resource covering many subects for the amateur
CRA Lyons Extremely comprehensive page dealing with Galaxies. Includes references, links, databases, etc.
Harold Corwin's Home Page Data on Galaxies (Catalogs, RC3)
Hubble Images (Public) What we all wish for
IAU: Central Bureau for Astronomical Telegrams Report discoveries, check out latest discoveries
International Amateur- Professional Photoelectric Photometry (I.A.P.P.P) If you want to do some science!
International Occultation Timing Association (IOTA) THE place for up-to-the-minute occultation predictions
I.S.N. - International Supernovae Network A great place to check if you think you've imaged a Supernova
List of Recent Supernova As it says, this site list 'recent' supernova and where they occurred
Messier and NGC Images Useful new (June 2003) page to compare DSS images at different focal lengths and CCD chips
NASA/IPAC Extragalactic Database (NED) Great place to search for information about, in and around objects
NGC / IC Project Wealth of information, corrections, insights and descriptions about the two classic catalogs
Planetary Nebulae Observer's Home Page Images, data, challenges and more for Planetary Nebulae
QCUIAG - Astronomical Imaging
SEDs The complete NGC/IC catalog from the NGC 2000.0 (Roger Sinnott) with images available
SkyView POSS images, many advanced ways of downloading the digital sky
StarLight Xpress Image Gallery A selection of images taken with the Starlight Xpress CCD camera
Sloan Digital Sky Survery Release 1 The latest and perhaps biggest sky survey yet.
STSci Digitized Sky Survey (DSS) 10X compression images of POSS First & Second Generation surveys (South too!)
The Globular Cluster Page As it says, information, lists, etc. on Globular Clusters
The National Deep Sky Observers Society Dedicated to serving the needs of the amateur deep sky observer
Webb Society Amateur visual observations of all kinds of deep sky objects

Amateur Astrophotographers

Jeff Ball - CCD and Color film images with a refractor
Steve Bell - CCD images with a reflector
Matt BenDaniel - Color film images with a refractor
John Blackwell - CCD images with refractors
Stefan Beck - Color film and Tech Pan images with a reflector and a Schmidt camera
Shekhar Borde - Color film images with a reflector
John Boudreau - CCD and Color film images with a refractor and an SCT
David Boyle - CCD and Color film images with a refractor and an SCT
Michael Breite - CCD and Color film images with an SCT and a Hypergraph-Cassegrain
Steve Cannistra - Color film images and Canon 10D digital camera images with a refractor
Alan Chen - CCD images with a refractors and a SCT
David A Churchill - Color film images with refractors and a Ritchey-Chretien Cassegrain
Antonio Cidadao - CCD imaging, webcam and an SCT
Michael Cole - CCD and Color film images with a refractor and an SCT
Chris Cook - Color film images with a refractor
Richard Crisp - CCD images (narrow band) with refractors and SCT's
Russ Dickman - Color film images with a refractor
Bob and Janice Fera - Color film images with an SCT
James R Foster - CCD images with a Classical Cassegrain
Michael Gartland - CCD and Color film images with a refractor
Robert Gendler - CCD images with a Ritchey-Chretien Cassegrain and refractors
David Gimenez - Tech Pan images with a refractor and an SCT
John Gleason - CCD and Color film images with a variety of instruments
Ray Gralak - CCD images with a Ritchey-Chretien Cassegrain and refractors
George Greaney - Color Film images with a refractor, Ritchey-Chretien Cassegrain and an SCT
John Gretchen - CCD images with a reflector
Piermario Gualdoni - Color film images with a refractor
P-M Heden - Color film images with an SCT
Andy Homeyer - Color film images with a refractor
Allen Hwang - Color film images with a refractor
James Janusz - Color film and Tech Pan images with a refractor
Steven Juchnowski - CCD images with an SCT (from 'down under')
Preston 'Scott' Justis - Tech Pan film images (some color collaborations) with a reflector
Paul Kanevsky - CCD images with a refractor and and SCT
Bert Katzung - Color film and CCD images with a refractor, a Ritchey-Chretien Cassegrain and an SCT
Philipp Keller - CCD images with a (large) reflector
Kent Kirkley - Tech Pan images with a Schmidt camera
Yuuji Kitahara - Color film images with a reflector
Dave Kodama - Color film images with a refractor
Jon Kolb - Color film images with a reflector (Hyperbolic Astrograph)
Walter Koprolin - Color film images with a refractor and an SCT
Rick Krejci - CCD images with a refractor and a reflector
Jason Lewis - Color film images with a SCT
Thierry Legault - CCD images with an SCT (and other compound systems)
Steve Lindsay - Color film images with a telephoto and an SCT
Jerry Lodriguss - Color film images with a refractor
Marco Lorenzi - Color film images with a reflector
Brian Lula - CCD images with a reflector
Jeff MacQuarrie - CCD images with a reflector
Steve Mandel - CCD and Color film images with a variety of instruments
Tom Matheson - Color film images with a refractor
John A McCubbin - CCD images with a refractor and a reflector
William McLaughlin - CCD images with a Ritchey-Chretien Cassegrain and a refractor
Axel Mellinger - Color film images with telephoto lenses (panoramas) and a reflector
Dave Messier - Color film images with a refractor and an SCT
Bobby Middleton - Color film + Tech Pan (LRGB) images with a reflector
John Mirtle - Tech Pan and Tri-Color images with a reflector and a Schmidt camera
Jim Moody - CCD images with an SCT
Herm Perez - Color film images with a reflecter
Philip Perkins - Color film and CCD images with a refractor, a SCT and a Ritchey-Chretien Cassegrain
Tony Pilato - Color film images with an SCT
Tom Polakis - CCD images with a reflector
Jay Potts - CCD images with a refractor and SCT's
Wolfgang Promper - CCD images with a SCT
Robert Provin and Brad Wallis - CCD, Color film, black & white Tech Pan and Tech Pan Tri-Color images with refractors and a Ritchey-Chretien Cassegrain
Glenn Ray - Color film images with an SCT
Robert Reeves - Color film and Tech Pan images with a Schmidt camera
Mike Regish - Color film images with an SCT
Daniel Reyna - Color film images with a refractor and an SCT
Michael Richmann - CCD and Color film images with a Ritchey-Chretien Cassegrain and an SCT
Richard Robinson - CCD images with an SCT
Dave Rowe - Color film images with a Slevogt concentric Schmidt Cassegrain
Matthew T Russell - CCD images with a refractor and an SCT
Benoit Schillings - CCD images taken with a variety of compound instruments
Doug Schmutz - Color film images with a refractor, an SCT and a Schmidt camera
Chris Schur - CCD and Color film images with a reflector and a Schmidt camera
Randy Smith - (under construction) CCD and Color film images with a reflector
Michael Stecker - Color film images with a refractor and an SCT
Gary Stevens - CCD images with a refractor and an SCT
Michelle Stone - CCD images with an SCT
Shoji Suzuki - CCD images with refractor, a reflector and an SCT
Loke Kun Tan - CCD and Tech Pan Tri-Color images with a refractor, a Ritchey-Chretien Cassegrain and a Schmidt camera
Jim Thommes - Unconventional Webcam
Scott Tucker - Color film images with a refractor
Ian Turner - CCD images with a refractor and a Ritchey-Chretien Cassegrain
Dan Thurs - CCD images with an SCT
Wei-Hao Wang - Color film images with a refractor and wide-field film mosaics
Abel van Weerd - CCD images with an SCT
Chuck Vaughn - Tech Pan and Tech Pan Tri-Color with a refractor and a Ritchey-Chretien Cassegrain
Brad Wallis - CCD and Tech Pan Tri-Color images with refractors and a Ritchey-Chretien Cassegrain
Manfred Wasshuber - Color film images with a variety of reflectors
Volker Wendel - CCD and Color Film images with reflectors and refractors
Rod Wodaski - CCD images with refractors
Alfredo Zanazzo - Color film and Tech Pan images with a Consentric Schmidt Cassegrain

Magazines

Amateur Astronomy Magazine
The Astrograph
Astronomy Magazine
Sky & Telescope Magazine
Astronomy Throughout the Net - Free monthly E-Zine with current Astronomy news
Universe Today - Space news from around the Internet, updated every weekday

All the Rest

Astronomical League The World's Largest Federation of Amateur Astronomers
Astro Links This is a page devoted entirely to astronomical related links (over 280)
AstroCam This is a page devoted entirely using webcams
Astro Photography Mailing List (APML) Archives Threads from the Astro Photography Mailing List (by month)
Austin Astronomical Society - A Texas Astronomy Society
Cloudy Nights- An astronomy equipment review site
Copper Breaks Star Walk Monthly Star Party at Copper Breaks State Park, in West Texas
Eagle Geocoding Determine your Longitude/Latitude - input an address to get your Longitude / Latitude
HomePhotography.net Amateur Photographers Gallery - Share your pictures with the world
International Dark-Sky Association (IDA) Because all deep-sky astrophotographers need a dark sky site
Jeff Bondono's Home Page Many links, advice and software
John Walker An amazing amount of useful software
McDonald Observatory
mySky Online Archived images from alt.binaries.pictures.astro newsgroup. All kinds of interesting images
Sky Transparency Map for North American Sky transparency forecast from Environment Canada
 SCT Advice - Advice for Beginners on SCT Telescopes
South Plains Astronomy Club
Space Archive Interesting 'sky' events for So Cal, including upcoming Vandenberg AFB launch events, maintained by Brian Webb
Telescope Review - A website dedicated to reviweing telescopes.
The Clear Sky Clock(s) A weather forecasting site

Vendors

Astromart You can sell and trade astronomical equipment
Astronomics - Everything you could want
Astronomy Mall Astronomical equipment and vendors
Astro-Physics, Inc High quality refractive optics, mounts and accessories
Bill and Sally Fletcher High resolution Tri-Color Astrophotography, Constellation portraits; also sell astronomical books and supplies
Celestron - Telescope Vendor
Ideal Imaging.com Scan your 35mm negatives or slides at up to 4000dpi. Special scanning attention paid to astro images
Jack Newton Florida Bed & Breakfast, plus imaging with a world renowned astroimager Jack Schmidling Amateur astroimager and astronomical accessories
Jason Ware Wide and Narrow-Field Color Astrophotography with Meade instruments
Megastar Sky Atlas My favorite charting program, current release is verion 5, indispensable! 
New Mexico Skies "A Guest Observatory for the Sophisticated Amateur Astronomer"
The Observatory , Inc A Dallas, Texas Astronomical Store
Tony and Daphne Hallas Incredible Film and Digital imaging; custom film photo /digital services
Wally Pacholka Award Winning Comet & Meteor Astro Photos for sale