The maps, produced using satellite images captured at 1.30am throughout September 2015, show that as well as having 52% of the AONB in the darkest category, 40% of the AONB is in the next darkest category.
This makes the Cranborne Chase AONB one of the darkest places in England.
Afterwards, the audience will join Bob and members of the Wessex Astronomical Society outside for a spectacular stargazing experience.
The series of stargazing events during 2017/2018 will be as follows: All events commence at 7pm and last for around two to two-and-a-half hours, depending on weather conditions.
Bob Mizon of BAA has provided some extremely helpful information on lighting that can be found below.