Useful external links
Astronomy Glossary - The Observatory.org
The Night Sky
Ask an Astrophysicist - NASA Scientists answer space related questions
Globe at Night - simple dark sky survey
Go Stargazing - Find the best stargazing locations
Heavens-Above - Night sky, ISS passes & Iridium Flares
Messier Objects - finder guides to 110 Messier & 109 Caldwell objects
Monthly night sky webcast - excellent monthly skynotes but you will need broadband!
Patrick Moore's Winter Marathon - Test your observing skills during the winter months. 25 for naked eye/binos; 25 for 'scopes.
Night Sky Info - weekly information about the night sky, astronomy articles and observations.
Occultations - occultations by the moon.
100,000 Stars - See where we are in the Galaxy!
Telescope.org - Control the Bradford Robotic collection of Telescopes and other instruments on Mount Teide, Tenerife.
The Planets and their Satellites
'Solar System Scope' - interactive model of the solar system
Jupiter's Galilean Moons - Sky & Telescope magazines interactive utility
Evolution of the Moon - From 4.5 billion years ago to today
NASA App - for Android, iPhone & iPad
Eyes on the Solar System - amazing graphics of all current missions (worth accepting the download to access)
Bob Jenkins' web site - lots of simulations
Scale of the Universe - Wow!
Free Astronomy Software
Stellarium - Interactive planeterium to download
IRIS - image processing software
REGISTAX - alignment, stacking and processing of images
SAO DS9 - astronomical imaging and data visualization
Virtual Moon Atlas - tour the moon!
Spaceengine.org - Create and fly around your own universe and solar system!
Google Sky Maps - Navigate around the night sky.
Cosmic Zoom (Android) - Fly through the universe and zoom in right down to elementary particles!!
ISS Detector - Receive alerts and viewing info about the International Space Station and Iridium Flares.
Lots of equipment reviews - telescopes, eyepieces, binoculars, web-cams, etc
Lots more equipment reviews - telescopes, mounts, eyepieces, binoculars, web-cams, etc
Astronomy Beginners Guide - Astroshop.eu
COAA - in the Algarve region of southern Portugal
Sasteria astronomy & art - in the south of Crete
News & Magazines
Sky & Telescope - some excellent resources here
Astronomy Now - some good info here
Sciencedaily.com - online research news
Other Useful Astro Sites
Social Astronomy, a Free Networking site - http://www.socialastronomy.com
Dark Sky Lighting - anti light pollution fittings
David Hinds - also see their (free to advertise) classified ads section for second hand equipment.
Evergreen Optics - telescopes and accessories for beginners and advanced astronomers.
Sherwoods - telescopes and accessories (Studley, Warks)