A Star Test Primer by Thomas Back - Good primer for star testing
Article on Optical Quality in Telescopes - The defacto double blind comparison of telescopes with different optical quality
Effects of poor Collimation on Images - Good information on the importance of good collimation
ST80 Gouge - Lots of information on how to get the most from your 80mm f5
More ST80 Tune Ups - Bob Berta's defacto tune-up guide for the ST80
Monthly sky maps - Great guide for what to see each month
Finder charts by constellation - Handy charts that are sorted by constellation
Skywatch Newsletter by Rod Mollise - Great newsletter with helpful information
Observing in Light Polluted Skies - great guide for observing in light polluted skies
Messier Guide - A nice self contained pdf on all the messier objects including pictures
How to Clean Optics by Al Nagler - This is the method I use for cleaning my optics
Todd Gross's Page - Excellent information and reviews of Astro products
Magnitude vs Aperture comparison chart
Simulated Planet images in different telescopes
Advice for first time scope buyers
Cloudynights - The best website for everything that has to do with amateur astronomy
Astronomical League - Great site for amateur astronomers. Loads of observing aids
Collimation Gouge - written by Obsession Telescope
Filter Performance
Comparisons for Some Common Nebulae - This is a great page on nebula filters
Autostar
Iterative method of alignment
Top Ten Deep Sky Objects for This Month - Jenny Kay FRAS
Deep Sky Sketches and Observations - Excellent site with a lot of sketches for deep sky stuff
Get your exact coordinates online - Great for goto stuff
Planetarium Software Programs - Comprehensive list of planetarium software for Win/Mac
Dark Sky Factor - Good site that outlines what kind of sky you have
Detailed Collimation - by Scott McCluney
Telescope and Eyepiece formulae - Great place for all those obscure formulae
http://www.astropix.com/HTML/B_WINTER/TRAPEZ.HTM
http://astronomy.trilobytes.com.au/martin-lewicki/saturnseeing.htm
http://home1.gte.net/amaroney/allen/ProjectPlans.htm
http://aa.usno.navy.mil/data/docs/diskmap.html
http://www.laughton.com/paul/rfo/trap/trap.html
http://mywebpages.comcast.net/bondono2/astro.html
http://www.phys.ksu.edu/~wysin/astro/magnitudes.html
http://www.fourmilab.ch/cgi-bin/uncgi/Solar
http://mysite.verizon.net/gpiepol/astroads.html
http://home.att.net/~jak.stargate/wsb/html/view.cgi-html2.html--SiteID-458422.html
http://home.fiam.net/ericj/aperture.html
http://www.maxon.net/sternkucker/artikel/transmission/transmission.html
http://www.cloudynights.com/beginners/eyepieces.htm