Astronomy organisations/societies in the UK
The Society for Popular Astronomy
https://www.popastro.com
Federation of Astronomical Societies – find your nearest local astronomy society – there are over 175 spread throughout the UK
https://fedastro.org.uk
The Society for the History of Astronomy
https://societyforthehistoryofastronomy.com
Webb Society – for deep-sky observers
https://www.webbdeepsky.com
UK Radio Astronomy Association
https://www.ukraa.com
The Royal Astronomical Society – the society for UK professional astronomers, but with many amateur members as well.
https://ras.ac.uk
Astronomy Magazines
Astronomy Now
https://astronomynow.com
The Sky at Night Magazine – a magazine based on the BBC programme. Includes some useful beginners’ guides
https://skyatnightmagazine.com
Astronomy
https://astronomy.com
Sky and Telescope
https://skyandtelescope.org
New Scientist
https://newscientist.com
Glossary and Definitions
https://en.wikipedia.org/wiki/Glossary_of_astronomy
https://aty.sdsu.edu/glossary.html
https://astunit.com/astunit_tutorial.pjp?topic=glossary
Observing
https://heavens-above.com (find a sky map, planets, when satellites will be visible etc)
https://stellarium.org (free software for night sky simulation including a mobile app)
https://fourmilab.ch/solar/solar.html (useful live plots of the positions of Solar System objects)
https://aurorawatch.lancs.ac.uk
https://gostargazing.co.uk (lists UK stargazing sites and astronomy meetings)
There are also numerous apps available for mobile phones.
Annual UK Star Parties
Kelling Heath Star Party – The UK’s leading observing event, in Norfolk. Occurs near Autumn equinox. Camping sites and some caravans. It also holds a Spring event.
https://las-skycamp.org
Kielder Forest Star Camp – Takes place twice a year in Northumberland’s dark skies
https://sites.google.com/a/richarddarn.com/kielder-forest-star-camp-bookings/
Places to visit in the UK
North of England and Scotland
Liverpool Planetarium – Part of Liverpool Museum
https://liverpoolmuseums.org.uk/whatson/world-museum/exhibition/planetarium
Jodrell Bank Visitor Centre, Cheshire – Displays about astronomy and their famous radio telescope
https://jodrellbank.net
Glasgow Science Centre – Includes a planetarium
https://glasgowsciencecentre.org
Mills Observatory, Dundee – Observatory and planetarium
https://www.leisureandculturedundee.com/welcome-mills-observatory-0
Midlands
National Space Centre, Leicester – Modern space and astronomy exhibits and planetarium
https://spacecentre.co.uk
Thinktank, Birmingham – Science centre with planetarium
https://birminghammuseums.org.uk/thinktank
South of England
The Observatory Science Centre, Herstmonceux, Sussex – Home of former Royal Greenwich Observatory, now a science centre with many astronomical exhibits
https://the-observatory.org
Royal Observatory, Greenwich – The original home of the Royal Greenwich Observatory, with the famous Meridian Line and historic telescopes
https://rmg.co.uk/royal-observatory
Winchester Science Centre and Planetarium
https://winchestersciencecentre.org
Island Planetarium, Isle of Wight – Part of Fort Victoria Country Park
https://islandastronomy.co.uk
South Downs Planetarium, Chichester – Planetarium and science centre
https://southdowns.org.uk
The Observatory Science Centre, Herstmonceux, Sussex – Home of former Royal Greenwich Observatory, now a science centre with many astronomical exhibits
https://the-observatory.org
Royal Observatory, Greenwich – The original home of the Royal Greenwich Observatory, with the famous Meridian Line and historic telescopes
https://rmg.co.uk/royal-observatory
Winchester Science Centre and Planetarium
https://winchestersciencecentre.org
Island Planetarium, Isle of Wight – Part of Fort Victoria Country Park
https://islandastronomy.co.uk
South Downs Planetarium, Chichester – Planetarium and science centre
https://southdowns.org.uk
We the curious, Bristol – Interactive science centre and planetarium
https://www.wethecurious.org/
Second-hand Equipment
The BAA’s sales forum
https://britastro.org/forums/forum/for-sale-wants-giveaway
The SPA Forum has a ‘Classified’ section
https://popastro.com/forum
UK Astro Buy & Sell
https://www.astrobuysell.com/uk/
Photo Galleries
Gallery of BAA member’s images
https://britastro.org/observations
Hubble Space Telescope pictures
https://hubblesite.org
Planetary photos from NASA spacecraft
https://images.nasa.gov
Space Agencies
In total there are about 77 international space agencies. Some of the most notable are:
The UK Space Agency is an ex-ecutive agency, sponsored by the Department for Science, Innovation and Technology
https://gov.uk/government/organisations/uk-space-agency
National Aeronautical Space Administration, USA
https://nasa.gov
Jet Propulsion Lab, a research and development lab funded by NASA and managed by Caltech
https://jpl.nasa.gov
The European Space Agency
https://esa.int
Canadian Space Agency
https://www.asc-csa.gc.ca/eng/
Japan Aerospace Exploration Agency
https://global.jaxa.jp/
China National Space Administration
http://www.cnsa.gov.cn/english/
Indian Space Research Organisation
https://www.isro.gov.in/
UAE Space Agency
https://space.gov.ae
SETI
Search for Extraterrestrial intelligence
https://seti.org
No responsibility is taken by the BAA or SPA for the accuracy or bona fides of these websites.