The early life of Sir Patrick Moore will be the subject of a talk at the Record Office in Chichester on 27 June.
The talk on Sir Patrick, who died in 2012, will be given by world-renowned astronomer and principal lecturer at the South Downs Planetarium, Dr John Mason.
Dr Mason, a close friend of Sir Patrick for nearly 45 years, will provide a fascinating insight into the first 25 years of his life, before he became a household name as an astronomer, author and broadcaster.
And he will showcase examples from a large collection of observational notebooks compiled by Sir Patrick, together with memorabilia recovered from his former home in Selsey.
The notebooks have recently been digitised by staff at the Record Office and the audience will have an opportunity to view images on their public access computers.
The event has been organised to coincide with the 60th anniversary of the BBC's Sky at Night programme, presented by Sir Patrick from its first episode in 1957 until his death in 2012.
The talk will be held at West Sussex Record Office, 3 Orchard Street, Chichester PO19 1DD on Tuesday 27 June at 7pm.
A limited number of tickets are available at £8 each (including light refreshments), which should be purchased in advance by visiting the Record Office or calling 01243 753602.
Sir Patrick Moore with Brian May, of pop group Queen, who was a close friend.