Mills Observatory

Mills Observatory is the UK's only full time public observatory. The building with it's distinctive papier-maché dome, was opened in 1935. It houses a refracting telescope, a small planetarium and display areas.


Display Area

The display area is split into two parts. The main area in the centre of the building at ground floor level provides changing displays of pictures and models, and also houses the observatory shop. A computer is available to browse CD based astronomical information. The content supplied changes from time to time.
The upper level provides displays of historic equipment and information of local importance.


Observatory

The main telescope is a 0.25m (10 inch) refractor, with a focal length of 3.75m. The instrument was built by Thomas Cooke of York in 1871, and is older than the observatory itself.The dome houses a fine 250 mm refracting telescope.

When the Mills Observatory opened on 28th October 1935 it originally housed an 450 mm (18 inch) reflecting telescope, constructed by the Newcastle based company of Grubb Parsons. The remains of the original telescope can be seen in the upper display area of the observatory. The dome itself is made of papier-mâché with a steel frame, and was also supplied by Grubb Parsons.
Refracting telescopes have long been regarded as the superior instrument for planetary observing. During our winter evening hours, given clear sky conditions, the telescope is used to show the public the night sky. This facility is free of charge.


Planetarium

The planetarium is based around a Viewlex Apollo projector, which simulates the night sky on a domed roof in a darkened room.

Around 1000 stars are displayed, along with the naked eye planets and the Milky Way. Auxiliary units simulate a rotating galaxy, and provide pictures of astronomical objects.

Seating is limited to 18 for public shows. However school classes of up to 45 primary school grade and 30 secondary school grade can be accommodated by arrangement using a temporary inflatable dome when necessary.


Visitor Information

The shop sells a variety of items including mini-telescopes, planispheres, water rockets, shooting stars(really!), rocks and minerals, books, posters, sweets and a huge selection of other desirable objects! Tea, coffee and juices are available, along with a variety of biscuits and chocolate bars.

Regrettably, access at the Observatory is difficult for people whose mobility is limited. There are 4 steps to enter the main area, and unfortunately no lift is available for access to the upper levels.


Opening times

April to September
Tuesday to Friday 11.00am to 5.00pm
Saturday & Sunday 12.30pm to 4.00pm

October to March
Monday to Friday 4.00pm to 10.00pm
Saturday & Sunday 12.30pm to 4.00pm


Dome Opening Hours
After dark on clear evenings between October and March. At most other times this area is closed but visitors can request to see the instrument.

Entry is free and there is ample free parking beside the Observatory.