BAS is a friendly welcoming society of approximately 60 like
minded people of varying levels of expertise and ages. Our twice monthly regular meetings held south of Basingstoke cover both the practical and theoretical aspects of astronomy.
You don't have to be a member to come along and see what we get up to.

We meet at Cliddesden Primary School, Cliddesden, RG25 2QU.  on the 2nd and 4th Thursday of every month apart from July and August when there are no scheduled monthly meetings.

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Chairmans Lego model of the European Extremely Large Telescope

Next Events

Our next meeting is a our only meeting in December and is our main meeting with guest speaker Mark Kidger, from ESA, who will be speaking to us about 'The Strange Case of the Ghost of Elenin".  a search for the Far-Infrared Ghost of C/2010 X1 (Elenin) with Herschel.


Observations of Comet C/2010 X1 (Elenin) in August 2011 showed a pattern of evolution of coma morphology into an expanding, amorphous cloud of rapidly decreasing surface brightness shortly before perihelion passage, similar to C/1999 S4 (LINEAR) in 2000. However, the comet’s difficult viewing geometry at the time of disruption made it impossible to study the event using high-resolution imaging techniques and, in particular, to measure the ratio of dust to cometessimals which gives information on the internal structure of the nucleus before disruption.  The team report Herschel/PACS observations of the defunct Comet C/2010 X1 (Elenin), aimed at detecting its infrared ghost: the debris cloud and any remaining inert, or low-activity cometessimals that may have been released in the break-up of the nucleus, taking advantage of the comet’s close pass to Earth in mid-October 2011.

Kidger, M.R., Altieri, B., Müller, T. et al. Earth Moon Planets (2016) 117: 101. doi:10.1007/s11038-016-9484-3

This takes place on Thursday 8th December at Cliddesden School starting at 7pm.

Check out our events page for a full list of events. 

Gaia Sky from ESA

Gaia Sky is an open-source, real-time 3D astronomy-visualisation tool that’s based on the European Space Agency’s Gaia mission to chart around one billion stars in our galaxy. Once you’ve chosen the graphics quality, resolution and mode (windowed or full screen), the program opens on a view of the Earth as seen from space. Gaia Sky takes a while to load so be patient. Click and drag with the left button to move the view, and click the button again to freeze everything.

 Download the software here

 Zentrum für Astronomie: Gaia Sky