Brian's Timelines

Explanatory Pages

Glossary
Short explanations of astronomical terms

What Is...
Longer explanations of less well understood matters

Laws
Measurements, Laws, Constants & Definitions

Your Telescope
What to look for in a telescope

Exo-Planets
Exo-Planets so far discovered, as of 31 March 2020

Astro-Satellites
Astronomical satellites

Stellar Classes
Explanation of the differences between stars

Astronomical Images - List of World Wide Web Servers specialising in astronomical image archives.
Astronomy Expert - Site concerned with the study of Stars, Planets and Outer Space Phenomena with a high quality monthly newsletter.
AstroWeb Listing of ground-based Telescopes.
AstroWeb Listing of spaceborne Telescopes.
BBC Space Science page Including Sir Patrick Moore's "Sky At Night"
British Astronomical Association
British National Space Centre
Encyclopaedia Astronautica
ESA European Space Agency
ESO European Organisation for Astronomical Research in the Southern Hemisphere
Telescope Data Center at The Harvard-Smithsonian Center for Astrophysics
Harvard List Of Observable Comets
Harvard List Of Potentially Hazardous Asteroids
NASA "Picture Of The Day" Calendar
Space Weather Prediction Centre Solar And Geophysical Events
Virtual Observatories Virtual Tours of 30-odd major Observatories

Solar Views - Probably the best site for information concerning all the Solar System bodies, the statistics are very impressive
Video Jug Astronomy - Seven, astronomical question and answer sessions videos by Sir Patrick Moore and Chris Lintott
Heavens Above - If you are into artificial satellite watching, this is probably the best site for predicting satellites and space stations. It also covers comets, etc.
Satscape - Excellent program to track all earth-orbit satellites, on your PC
SpaceWeather - Best site for up-to-date information on solar weather, auroras and potentially hazardous asteroids (PHAs)
Atmospheric Optics - A host of visual spectacles - rainbows, halos, glories, coronas and many more
Green Flashes and Mirages Introductions to these two phenomena from San Diego State University

The Society For Popular Astronomy - Great informative site for amateur astronomers
The Nine 8 Planets - a tour round the Solar System

Telescope optics in detail - Degree level maths and optics, but definitely worth a read. Good descriptions of every conceivable type of telescope except sadly, Ritchey-Chrétien (as at August 2007)
A brief Tutorial Guide - Astrophotography and Telescope Basics

Build your own refracting telescope
Build your own reflecting Dobsonian
Telescope mirrors, blanks, flats & Kits
Oldham Optical UK - Manufacturer of Astronomical & Industrial Optics. Not cheap but they do give a PV 1/10λ Wavefront option with a "Certificate of Conformity" on all mirrors.
Build your own telescope, a lab experiment

Skywatcher Telescopes - UK
Orion - UK
Mead - USA - Probaby the best
Celestion - USA
Obsession Telescopes - USA
Optical/Astronomical Manufacturers
A webpage with a fairly Exhaustive listing. (Sadly, not all links on this page are in working order)

News at ESO - European Southern Observatory Newsletter
News at ESA - European Space Agency Newsletter. Loads of subject options and available in any of 20-odd languages!
Science at NASA - Weekly Newsletter of everything important
SpaceDaily - Eight diferent newsletters, ranging from Astronomy to Space Wars
Dailygalaxy - About evenly split between Astronomy and other matters