Next Monthly Meeting:

September 24 @ 7:30 pm - 10:30 pm

Letchworth Free Church Hall, Letchworth

Simon Mitton: ” From Ptolemy to Einstein and thence to dark energy: geometry as the tool to understand the universe” Continue reading

Upcoming Special Events:

Public Star Party

September 20 @ 7:30 pm - 10:30 pm

Standalone Farm, Letchworth

Come and join us for an evening of talks, demo’s and viewing the night sky through the society’s telescopes. Refreshments will be available.

Education Meeting

October 15 @ 7:30 pm - 10:00 pm

Letchworth Free Church Hall, Letchworth

Nick Ellis- Cosmic Monsters: Black Holes, Neutron Stars and other Extreme Phenomena Continue reading

Welcome !

Our Society

Whatever the level of your interest in astronomy, welcome to Letchworth & District Astronomical Society.

AndromedaLDAS is based in Letchworth, at the north end of Hertfordshire. Although we have over 120 members, we are a very informal, friendly society and provide a service for the complete beginner as well as those with sophisticated home observatories. We hold regular meetings, star parties and other events for members and the public alike. We are also more than happy to present talks to clubs, schools and other organisations, and for them to visit our observatory. Talks and visits are free although donations to the society are gratefully accepted.

We invite everyone to join in our events, whenever and wherever they happen!

Our astrophotography group posts some of their amazing images on Flikr at and in this site’s Image Gallery.

Please look through these pages, and if you need any further information, please contact us using the Contact Form or see the Committee page for further contact options.

You can find out more about the society on our About Us page.


We hold meetings with guest speakers on the last Wednesday of each month, except in December, when we hold our AGM and Quiz around the middle of the month. We also run a series of talks, given by members, on subjects at a level suitable as an introduction to astronomy eg The Life of a Star, Relativity.  In 2014 our theme will be ‘Key Moments in Astronomy’ and will include talks on ‘The Big Bang’ and ‘The Extreme Universe’. Details, once finalised, will appear in the Programme page.  We meet at the Free Church Hall near the centre of Letchworth. You can find information about our meetings on our Meetings page, and a full listing of our events for the year on our Programme page.

For further news about our events, and to book places, please write to: [Replace "-at-" with "@" - This formatting is to help prevent "spam' messages.]


We have an observatory to the north of Letchworth at the Standalone Farm Centre in Wilbury Road (SG6 4JN) where we hold observing sessions and other events. You can see the location in Google Maps, and you can find out more on our observatory page. The observatory was upgraded in 2010 with a 14-inch Meade LX200 computerised telescope. You can download a landscape file that shows the surroundings for the LDAS observatory that can be used as the background landscape for the the (free) planetarium program Stellarium.

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