Your Basket

Visit Us

Find Us

The Observatory Science Centre is within the Herstmonceux Castle Estate in East Sussex. It is 2 miles east of the village of Herstmonceux on the Boreham Street to Pevensey Road, near Wartling.

Look for brown directional tourist signs to 'Herstmonceux Castle and Science Centre'.

Sadly, there are not many brown directional signs but as you approach the area if you can spot the green, copper clad domes - or the grey, steel Isaac Newton Dome, then you are almost here!

From the north:The most direct route is to continue south on the A22 to the large Cophall Roundabout at Polegate, just north of Eastbourne and then to proceed as below (from the west).

From the west:
Travel along the A27 to Polegate, then at the Cophall Roundabout follow the A22 / A27 eastbound to Pevensey. At the Pevensey Roundabout, take the 1st exit on the left and follow the sign for Herstmonceux Castle, 3 miles along the Wartling Road.

From the east:
Travel along the A259 to the Pevensey Roundabout. Take the 4th exit and follow the sign for Herstmonceux Castle, 3 miles along the Wartling Road.

Frequently Asked Questions

  • + How do you pronounce Herstmonceux?

    As with most place names there is a 'correct' pronunciation amongst local people and Herstmonceux is no exception. 

    Herst is the Saxon name for a wooded hill, and the manor is mentioned in the Domesday Book as being part of the land belonging to the Count of Eu.

    In 1131 the Count's grandson transferred the manor to Drogo de Monceux, (great grandson of William the Conqueror) who married Idonea de Monceux. Their son was known as Walleran de Herst Monceux. 

    To answer the question 'How do you pronounce Herstmonceux?'

    • Herst as in 'first'
    • Mon as in 'monsoon'
    • Ceux as in 'zoo'


  • + I’ve had a star named after me! Can I see it through a telescope?

    This is always a difficult question.

    It very much depends on where the star is and how bright it is. Many of the stars are far too faint and distant making it extremely difficult to pinpoint.

    To avoid disappointment therefore we do not usually offer to locate such stars with our telescopes.

    Do you offer a "star naming" service?

    No we do not. 

    Some commercial enterprises do say that they offer such a service and will charge a fee for it. However such "names" have no formal or official validity whatsoever.

    This is an excerpt from the International Astronomical Unions (IAU) website:  As an international scientific organization, the IAU dissociates itself entirely from the commercial practice of "selling" fictitious star names or "real estate" on other planets or moons in the Solar System. Accordingly, the IAU maintains no list of the (several competing) enterprises in this business in individual countries of the world. For further information please visit the IAU website www.iau.org/public/buying_star_names/ 

  • + Has the Hubble telescope made earthbound telescopes redundant?

    Not at all.

    Space telescopes fulfil a very important role but they cannot be made as large as ground based telescopes due to weight and the cost of getting them into space.

    The wider the diameter of a telescope the better light gathering ability it has and the more detail it can resolve.

    At the moment the largest ground based telescope is the Gran Telescopio Canarias (GranTeCan or GTC). It is a 10.4 m (410 in) reflecting telescope located at the Roque de los Muchachos Observatory on the island of La Palma, in the Canaries, Spain. It is the world's largest single-aperture optical telescope.

    Although atmospheric disturbance is not a problem encountered by space telescopes, many ground based telescopes do have a problem and atmospheric disturbance can distort the image.  However, adaptive optics used with large ground based telescopes can compensate for distortion caused by the atmosphere.

  • + Who uses the telescopes at Herstmonceux now?

    While the telescopes are not being used scientifically for research purposes they are open to the public on our open evenings which are usually held during the Autumn, Winter and Spring with one or two exceptions in the summer.

    They are also open on our special themed evening events which take place throughout the year.

    You can also hire the centre for private evening group visits when you may get the opportunity to use the telescopes (weather permitting).

    Twilight educational visits or scouting and guiding group visits can also be arranged.

  • + Can we look through the telescopes during the day?

    No, because if you catch the Sun it will blind you.....

    Also daylight swamps the light coming from celestial objects making them almost impossible to see.

  • + Is The Centre on the meridian line?

    Not quite, Herstmonceux is 0.320 E of the Greenwich Meridian.

  • + Can we visit the Isaac Newton dome?

    No. This is an empty building and does not have any public access. 

  • + Does science centre admission price include admission to the Gardens & Grounds of Herstmonceux Castle?

    The Centre is located within the estate of  Herstmonceux Gardens and Grounds  but is a separate business.

    You can purchase combined entry tickets from the reception at both attractions.

  • + Do you have a Membership Scheme?

    We have a popular Membership Scheme

  • + Can we use the catering/ toilet facilities without paying an admission price?

    We will always help our visitors wherever possible, but we do not permit entry without a valid admission ticket.

  • + Is The Centre suitable for young children?

    The Centre is suitable for all ages and abilities. 

    Children are not admitted unless accompanied by an adult.

    Due to the nature of the site all visitors should take care of the ramps /steps / pond etc and all children under 16 years of age must be accompanied and supervised by an adult at all times.


  • + Do you have to book for Stargazing Evenings?

    No you don't have to book because viewing through the telescopes is always subject to weather conditions.

    You do however have to book for our special themed evening events.

  • + Are there concession admission prices?

    As an independent, educational charity and visitor admissions are our main source of income. 

    We will always admit carers free of charge to a maximum 1-1 ratio (Blue Badge, benefit Award Letter or similar required).  We also offer family and group rate tickets but are unable to offer discounts for students or the unemployed. 

    We have a Membership Scheme which offers fantastic value for year round admission.