I’m delighted to confirm our guest speakers for the 2022 Star Stories programme. Following a ‘Stargazing Burns’ event on January 27th we’ll have a dark sky event in February with guest speaker Martin Hendry, Professor of Gravitational Astrophysics and Cosmology at the University of Glasgow. Martin is a regular visitor to the forest and will be updating us on the latest discoveries on dark matter and dark energy followed by naked eye and binocular stargazing under Abriachan’s Milky Way class dark skies.
Then in March we’re very excited to welcome Scotland’s new Astronomer Royal, Catherine Haymens. Catherine will be joining us on March 14th for a special Moon night with a talk all about the Moons of our solar system. This will be followed by a live Moon observing session and Q&A. Catherine is Professor of Astrophysics and a European Research Council Fellow at the University of Edinburgh. She’s also director of the German Centre for Cosmological Lensing at the Ruhr-University Bochum.
Where possible, and understandably, all events will be setup for outdoor learning so please bring plenty of warm clothes and wrap up. Storytelling and other family friendly activities will also be delivered by the Abriachan team and guests. Ticket links will go live about 4 weeks prior to each event. Please follow my Facebook page for the latest.
Meanwhile the November 27th event has now sold out. This will be a dark sky evening with stargazing or astronomy talk presented by yours truly. Best selling author John Burns is our guest storyteller in November.
The dynamics of the rings are so subtle and complex. Some of the gaps in the rings are made by moonlets clearing paths, whilst other moons are actually replenishing the rings.
The small moon Enceladus is a fascinating example. It’s spewing out frozen ice from its south pole due to tidal heating, effectively generating Saturn’s faint E ring (the faint blue outer ring pictured above).
Enceladus, a small icy Moon with a salty internal ocean. Tidal stresses imparted by Saturn produce great jets of water from the southern pole of Enceladus, which instantly freeze, adding icy material to Saturn’s E ring.
You could sit on a moonlet of Saturn and watch the rings forming little wavelets in real time around you. Some of the larger rings actually wash back and forth like waves on a giant ocean.
Many of the smaller moonlets orbiting Saturn have a polished or smooth aspect to them. This is due to fine particulates from the rings being drawn towards them due to gravity, effectively power coating the surface and covering over any craters or blemishes. This accretion of material onto the moons has been imaged by Cassini.
We had great turnout for the kickoff. The next event is a Moon special on Nov 7th. Look out for eventbrite links here on on my Facebook page.
The tiny moon Pan, clearing a path through Saturn’s rings. Its gravity is strong enough to produce beautiful ripples within the rings. As it orbits, Pan receives a fine power coating of frozen dust from the rings lending the moonlet a smooth, polished appearance.