We are back at our normal venue from 3rd Sept. 2021 |
This page lists our monthly meetings. For other events open to the general public, see our Events page
Dates are set well in advance but the 'content' of the meeting is only updated (from our 'meetings database') when details are entered, so 'blank' or 'TBA' may be shown when data has not yet been entered (please be assured that the meeting will take place and a talk on (some) Subject will be delivered by (some) Speaker ! )
During the COVID-19 restrictions, all meetings are being held on-line using ZOOM. Meetings are normally held at the Church Hall (aka 'The Soltau Center') of St James-the-Less, Stubbings, Maidenhead SL6 6QW, from 7.30 (for a ZOOM link, or map and directions, see the About MAS (Where we meet) page
The Main Topic is usually delivered by an invited guest speaker. We aim to provide a diverse range of subjects linked (in some way) to Astronomy - whilst the 'Second Session' is typically delivered by one of our members. If time allows, the evening concludes with a short 'What to see this month'.
Details of a typical evening (times are approximate) :- 7.30pm. The evening starts with the Chairman delivering any important Announcements and then introducing the main speaker. 7.45pm (latest). Main Topic Speaker gets up and the lights are turned off. If you arrive after 7.45, please enter the Hall by the first door (on the right, after the entrance) and please be extra careful when finding a seat at the back of the Hall as members often setup telescopes there ! 8.45-9pm +. Coffee break during which visitors often chat with members who have set-up their telescopes at the back of the hall. If the weather is good, sometimes members will nip out for a quick look at the sky. Smoking is permitted outside the Hall, however smokers are asked to avoid any 'observers' (smoke particles always seem to get into optical equipment, no matter how well 'sealed' it may be) 9.15pm (at the latest). The 'Second Session' then runs for about 45 mins, typically ending with "What's Up !" (what to look out for in the sky this month) 10pm. We aim to clear the hall by 10pm. Post meeting Observing. If the weather is good, the Observing Organiser then leads the way to our chosen observing site, or (if the weather looks even a slight bit 'iffy) members sneak off to the local Pub instead :-)
Next meeting :
(+) 1 Nov 2024 Black Holes and exploding Stars - (Dr Chris Crowe)
(+) 6 Dec 2024 Christmas Quiz - (by members)
(+) 3 Jan 2025 Telescope Parade and Workshop - (by members)
(+) 7 Feb 2025 The Armchair Messier Marathon - (Lillian Hobbs)
(+) 7 Mar 2025 Admiral William Henry Smyth and the Bedford Catalogue - (Rob Peelings)
(+) 4 Apr 2025 TBA
(+) 2 May 2025 TBA
(+) 6 Jun 2025 MAS 68th AGM - (Annual General Meeting)
Meetings Archive |
The meetings archive gives an 'overview' of the Society activities over the past 10 years (see also the Events page).
Members have access to the full 'History of MAS' (including AGM minutes going back to 1957) along with full names and photos
The MAS 'year' runs from September of one year to June of the following. The end of year AGM in June elects the Committee for the following year (there are no meetings in July and August - although often members will meet informally at the local pub - which gives the new Committee time to 'get a grip' on running the Society)
The "short cuts" (in the 'title bar', at the very top of this page) will take you to the June AGM entry for the end of that MAS year
The Maidenhead Astronomical Society meetings archive (last 10 years only)
Missed a meeting, or can't remember when a topic was last covered ? Here is the archive of past MAS meetings.
Note that this list covers only our monthly meetings and AGM's. Reports on Observing and Other Events are separate pages
If notes were taken at the meeting, the date below is underlined and shown with a '(+)' = click to see the notes (if no '(+)' is shown, no notes were taken - or, more likely, the webmaster hasn't found them and posted them up yet :-) )
(+) 4 Oct 2024 The Crendon Observatory - (Gordon Rogers)
(+) 6 Sep 2024 The Discovery of Neptune - (Barry Kellett)
(+) 7 Jun 2024 MAS 67th AGM - (Annual General Meeting)
(+) 3 May 2024 The Exploration of Venus - (Jim House)
(+) 5 Apr 2024 The Visible Universe - (Doctor Max Whitby)
(+) 1 Mar 2024 Water in the Universe - (Prof Jonathan Tennyson)
(+) 2 Feb 2024 The Mechanics of Eclipses - (Sheridan Williams FRAS)
(+) 5 Jan 2024 Telescope Parade - (and the Parker Solar Probe by Arthur White)
(+) 1 Dec 2023 SPECIAL FEATURE Herschels Lunatick Friends - (Andrew Lound)
(+) 3 Nov 2023 Binary Pulsars Einsteins Perfect Laboratories - (Barry Kellett)
(+) 6 Oct 2023 Solar Space Weather SOHO - (Dr Eric Dunford)
(+) 1 Sep 2023 The Changing Climate of Mars - (Peter Read)
(+) 2 Jun 2023 MAS 66th AGM - (Annual General Meeting)
(+) 5 May 2023 Two talks by members - (LATE CHANGE)
(+) 31 Mar 2023 Overview of telescopes and mounts - (Dave Hayes)
(+) 3 Mar 2023 Study of our Galaxy in the Era of Gaia - (James Binney)
(+) 3 Feb 2023 The Galaxy without a dark side - (Barry Kellett)
(+) 6 Jan 2023 Telescope Parade and Workshop - (by members)
(+) 2 Dec 2022 Xmas Social Photo Comp and Quiz - (set by members)
(+) 4 Nov 2022 Exploration of Jupiter - (Dr Mike Legett)
(+) 7 Oct 2022 The Lunar 100 - (Dr Lilian Hobbs)
(+) 2 Sep 2022 InfraRed Astronomy - (Dr Eric Dunford)
(+) 10 Jun 2022 MAS 65th AGM - (NOTE 2nd Friday)
(+) 6 May 2022 Gravitational Waves - (Joshua Pooley)
(+) 1 Apr 2022 Saturn - (Michael Foulkes)
(+) 4 Mar 2022 Update on the Exploration of Mars - (Jim House)
(+) 4 Feb 2022 What Astronomy Tells Us About The Origins of Life On Earth ? - (James Hough)
(+) 7 Jan 2022 Telescope Parade and Workshop - (by Members)
(+) 3 Dec 2021 Christmas Quiz set by members - (followed by Social Evening)
(+) 5 Nov 2021 CANCELLED - (Hall closed)
(+) 1 Oct 2021 Dark Nebulae - (Owen Brazell)
(+) 3 Sep 2021 How we reached the Moon - (Jerry Stone)
(+) 4 Jun 2021 63rd AGM (ZOOM on line meeting)
(+) 7 May 2021 Milestones in Astronomy - (Rod Hine (ZOOM on line meeting))
(+) 2 Apr 2021 The Red Sun - (Lyn Smith (ZOOM on line meeting))
(+) 5 Mar 2021 Tour of the Universe - (Jane Green (ZOOM on line meeting))
(+) 5 Feb 2021 Space Vehicles - (Graham Bryant (ZOOM on line meeting))
(+) 8 Jan 2021 The Astronomer's Toolkit - (Dr Lee Anne Willson (ZOOM on line meeting))
(+) 4 Dec 2020 Xmas Quiz - (set by members (ZOOM on line meeting))
(+) 6 Nov 2020 The Monster in the Crab - (Gary Poyner (ZOOM on line meeting))
(+) 2 Oct 2020 Is there anyone out there ? - (Bob Mizon (ZOOM on line meeting))
(+) 4 Sep 2020 Two eyes are better than one - (Stephen Tonkin (ZOOM on line meeting))
(+) 5 Jun 2020 COVID19 Postponed MAS 62nd AGM
(+) 1 May 2020 COVID19 Postponed The Monster in the Crab - (Gary Poyner)
(+) 3 Apr 2020 COVID19 meeting CANCELLED
(+) 6 Mar 2020 Recent Developments in Gravity Wave Research - (Martin Dyer)
(+) 7 Feb 2020 Ask an expert Q and A panel - (By Members)
(+) 3 Jan 2020 Equipment Parade - (By members)
(+) 6 Dec 2019 Xmas Quiz and social - (By members)
(+) 1 Nov 2019 The Origin of the Solar System - (James Fradgley)
(+) 4 Oct 2019 Kew Observatory and the origins of modern solar physics - (Dr Lee Macdonald)
(+) 6 Sep 2019 History of Mars Exploration - (Jim House)
(+) Aug 2019 Summer break - (no meeting)
(+) Jul 2019 Summer break - (no meeting)
(+) 7 Jun 2019 MAS 61st AGM - (and Photo Competition prizes)
(+) 3 May 2019 13 Journeys in Space and Time - (Colin Stuart)
(+) 5 Apr 2019 Space Weather - (Dr Colin Forsyth)
(-) 1 Mar 2019 The Extremely Large Telescope (ELT) - (Dr Aprajita Verma)
Friday, 1st March 2019 - “The Extremely Large Telescope (ELT) and large telescope design” Dr. Aprajita Verma
- Senior Researcher in Astrophysics & Cosmology at University of Oxford.
Notices
1) Our new Chairman, Matt, notes the sad passing of one of our older members, David Kershall.
2) Members are reminded of the Photo Competition - entries should be submitted as soon as possible to meet the end date of 6th May.
3) Lesley M updated members on the BBC Berkshire discussion on Lassell (7th February) that Kenelm was part of. She has started the process of applying for a Blue Plaque for Lassell at Ray Lodge. The Maidenhead Heritage Centre expressed their support.
Talk - The Extremely Large Telescope (ELT)
Dr. Aprajita Verma gave a good overview of the design process mentioning that after delays, building has started with the site preparation, the top of Cerro Armazones, in the Chilean Atacama Desert. First light for the completed telescope is now expected to be in 2025. The latest progress can be found here.
The 39m adaptive mirror, operating in the visible to near iR region, is bigger than all existing single mirrors pit together. Historically, the engineering limit for a single mirror, such as the VLT, has been about 8m. The solution, as used in the Keck, is to build the telescope from a series of sub-mirror segments fitted together in an array. The ELT will consist of 798 hexagonal 1.4m segments. The total weight, 2500 tons, means an Alt-Ax mount.
The optical path is a 5 mirror folded design - see photo, right, resulting in a focal length 743.4m. After the main mirror (M1) there are 2 in-line focusing mirrors (M2-3), before the flat, 6000 actuators adaptive optics mirror M4. A final 45 degree flat mirror, M5, then throws the light out along the mount axis.
Each of the main segments has 3 actuators to maintain the basic mirror shape as it is moved and to counter other such gross effects. The adaptive M4 mirror is the clever bit that compensates for atmospheric disturbance.For more on adaptive optics, see wikipedia. Suffice to say that traditionally the system relies on a star being visible in the field to use as a guide - if none exist (for example when looking at Galaxies) an artificial star is created by using a laser tuned to excite Sodium atoms in the upper atmosphere at 85 Km. The ELT will use 8 such lasers. For more on this, see Youtube, 2m 45s in
The resolution limit would allow it to see features as small as a London Bus on the Moon (not that it would ever be aimed there). It should allow direct imaging of extra-solar planets, permitting spectroscopic measurements for signs of life eg presence of Oxygen etc.
By looking at the movement of Quasars over 15 years, the ELT is expected to directly measure the expansion of the Universe. For more on the impact of the ELT, see ESO site.
For those wishing to build their own ELT, see here
After the break
Peter has a new telescope, moving from an 80mm to 100mm. He continues to use his Sony NEX-6 APS-C camera for prime focus imaging. He showed us a number of his most recent images, such as M33 (Triangulum) and M45 (Pleiades), stacking 8 x30s. He also showed a stack of a Comet.
One tip he has for us is that the Sony WiFi camera control app. does not permit RAW imaging, so he went back to using the iR remote.
Robin Showed off a number of single shot, non-stacked, images taken with his Canon 60Da. This included the Orion Neb, an attempt at the Horsehead (we could just make it out) and the Flame Neb.
Tim showed us a spectroscopic image of M42 taken with a basic 100lpi diffraction grating. This showed the colour spectrum of the gas clouds spread out across the field of view.
What's Up ! (Alun)
(download his full presentation from here)
With improving weather and still dark skies, we are coming into Galaxy Season ! Get those cameras out over the next few weeks for some really good views of the Galaxies of the 'Virgo Cluster' to be found to following Leo.
All our indoor Meetings are open to the public, however non-members are asked to make a contribution of £2 toward the hall hire costs (this may be collected by Fred, our Membership Secretary, at the door on arrival, or left at the 'Tea hatch' at half time).
This note last modified: 11th Jun 2019 09:21.