Question: Which Australian suburb serves as the headquarters for the Mornington Peninsula Astronomical Society?

Context paragraphs:
Foothill Observatory: Foothill Observatory is an astronomical observatory owned and operated by Peninsula Astronomical Society and Foothill College.  It is located on the college's campus in Los Altos Hills, California (USA).  The observatory is used by students enrolled in the introductory astronomy lab on campus, which is part of the college's thriving astronomy for non-scientists program, serving over 800 students per year.  It is also used for public viewing one evening a week.  A new 16 in telescope was donated to the observatory and went into operation in 2007.  The observatory is generally open to the public without charge every clear Friday night from 9 to about 11 pm.

HMAS Cerberus (naval base): HMAS "Cerberus" is a Royal Australian Navy (RAN) base that serves as the primary training establishment for RAN personnel.  The base is located adjacent to Crib Point on the Mornington Peninsula, south of Melbourne, Victoria, Australia.  The base is also an official bounded locality of the Shire of Mornington Peninsula and is the only naval base to have a specific listing in the Australian census.  As at the 2016 census , HMAS "Cerberus" had a population of 1,040.

Royal Astronomical Society: The Royal Astronomical Society (RAS) is a learned society that began as the Astronomical Society of London in 1820 to support astronomical research (mainly carried on at the time by 'gentleman astronomers' rather than professionals).  It became the Royal Astronomical Society in 1831 on receiving its Royal Charter from William IV.  A Supplemental Charter in 1915 opened up the fellowship to women.  It is the UK adhering organisation to the International Astronomical Union and a member of the Science Council, and encourages and promotes the study of astronomy, solar-system science, geophysics and closely related branches of science.  Meetings are held in Burlington House, in Piccadilly, London and across the United Kingdom (UK).  They are involved in the production of astronomical journals and periodicals.  The society has over 3000 members, around a third of whom live outside the UK.  In addition, those members of the public who have an interest in astronomy and geophysics and wish to support the work of the society may become Friends of the RAS.

Frankston Symphony Orchestra: Frankston Symphony Orchestra (FSO) is one of ten community orchestras in Victoria, Australia.  It is from the Melbourne suburb of Frankston on the Mornington Peninsula.  The orchestra forms a part of the Frankston Music Society, which also includes the Mornington Peninsula Chorale.

Frankston, Victoria: Frankston is an outer-suburb of Melbourne in Victoria, Australia, in the local government area of the City of Frankston.  It is located 41 km south-east of the Melbourne city centre, at the northernmost point of the Mornington Peninsula.  Due to its geographic location, it is often referred to as "the gateway to the Mornington Peninsula".

Mornington Railway: The Mornington Railway is a heritage railway near Mornington, a town on the Mornington Peninsula, near Melbourne, Victoria.  The line is managed by the Mornington Railway Preservation Society and operates on part of the former Victorian Railways branch line which ran from Baxter to Mornington.

Polish Astronomical Society: The Polish Astronomical Society (Polskie Towarzystwo Astronomiczne, PTA) is science society in Poland, founded in 1923, with headquarters in Warsaw.  Members of PTA are professional astronomers.  Purpose of the association is promoting the development of astronomical science, their teaching and outreach in community.  PTA is involved in publishing astronomical books, as well as popular science magazine Urania - Postępy Astronomii.  It organizes conferences and contests.  Current President of PTA is Agnieszka Kryszczyńska and number of members is above 250.  Polish Astronomical Society is a member of the European Astronomical Society.

Mornington Peninsula Regional Gallery: Mornington Peninsula Regional Gallery is a public art gallery on the Mornington Peninsula, south-east of Melbourne, Australia.  The gallery opened in 1971, and holds both traditional and contemporary Australian art.  In 2013 the gallery hosted an exhibition of Archibald Prize paintings, setting a gallery attendance record of 48,000.  The gallery is host to the National Works on Paper acquisitive art competition, established in 1998.  Artists whose work is held by the Mornington Peninsula Regional Gallery include Constance Stokes.

Mornington, Victoria: Mornington is a seaside town on the Mornington Peninsula, Victoria, Australia, located 57 km south of Melbourne's central business district.  It is in the local government area of the Shire of Mornington Peninsula.

Mornington Peninsula Astronomical Society: The Mornington Peninsula Astronomical Society (MPAS) is an amateur astronomical society based in the south-east of Melbourne, Victoria, Australia.  Formerly the Astronomical Society of Frankston (ASF), MPAS has a membership of approximately 160, and is the second largest such group in the state.

Supporting paragraphs: Mornington Peninsula Astronomical Society Frankston, Victoria
Answer: Frankston