The Blackett Observatory is located within the private grounds of Marlborough College. It is home to an incredible 10″ Cooke refractor steeped in history that offers stunning views of the Cosmos! Observing is organised by the observatory’s enthusiastic Director, Charles Barclay.
The observatory is not often open to the public; however, the facility is accessible to those outside the College interested in Astronomy. Becoming a ‘Friend of the Marlborough telescope‘ costs just a few pounds per year, less than a single ticket to attend some other observatories. In return, you will be given access to their diary of events, arrange private visits and attend regular lectures at the College.
Location events organiser
Weather forecast for Marlborough (0.7 miles away) updated 18/08/22 at 16:00.
Local light pollution
The above demonstrates the estimated effect of light pollution - graphics created using Stellarium.
Best time to visit
The below chart shows when the skies will be at their darkest at this location and therefore the best time to visit. Moonlight is shown in light yellow and the Sun's twilight in light blue. Midnight on the date shown is shown as a white line with sunset to the left and sunrise the next morning to the right. A black background with stars shows the best times for stargazing. See our dark sky calendar for more details.