New Members - Download Application form New Members - Download Application form Existing Members - Download Renewal form Existing Members - Download Renewal form Zoom link for Paid Up Members - (automatically takes you to registration and supplies log in details) Zoom link for Paid Up Members - (automatically takes you to registration and supplies log in details) Booking for visitors closes 4 - hours before the meeting starts Booking for visitors closes 4 - hours before the meeting starts Visitors register here - takes you to TicketSource for registration and payment Visitors register here - takes you to TicketSource for registration and payment
Next Meeting: Wednesday March 13th at 8:00pm Beyond Einstein and Modifying Gravity (or.. the Pizza that nobody ordered!) Ruth Gregory Live Session T&Cs apply
Set up instructions for PC and Mac Set up instructions for PC and Mac Set up instructions for iPad Set up instructions for iPad Set up instructions for Linux Set up instructions for Linux
Membership details: •£10 per year - renewable at end of July* •Non-members £2.00 first 3 meetings then annual membership subscription due pro rata for remaining meetings. •Free to under 18s and full time students. Proof of status may be required. •Under 16s must be accompanied by an adult.
Zoom admission details 19:30 for 20:00
(Please note that these Downloads do not work well in the Firefox web browser)
Visitors welcome - £2.00 per meeting
Blinking text HTML
We, Oct 11
Richard Goodrich
How the 1910 Return of Halley’s Comet (Almost) Destroyed Civilization
2023-24 Programme (subject to change)
Wed, Sep 6
Roger O’Brien
SpaceX Starship
Wed, Oct 11
Richard Goodrich
How the 1910 Return of Halley’s Comet (Almost) Destroyed Civilization
Wed, Nov 8
UH Students
Dark Matter Halos and Characterising Ultracool Dwarfs (2 talks)
Wed, Dec 13
Roger O’Brien
The Star of Bethlehem
Wed, Jan 10
David Arditti
Astronomers’ tools: Choosing the right telescope
Wed, Feb 14
Alan Davies
Rainbows, Haloes and Glories
Wed, Mar 13
Ruth Gregory
Beyond Einstein and modifying gravity
Wed, Apr 10
Jerry Stone
Island Zero Celebrating Yuri’s Night
Wed, May 8
Ian Morison
Our Island Universe - the Milky Way Galaxy and its place in time and space
Wed, May 15
HAG - AGM
All welcome to attend on Zoom
Wed, June 12
Andrew Coates
Looking for life on Mars and Habitability of Jupiter’s Moons
This meeting will be held at: University of Hertfordshire Lindop Building College Lane Hatfield AL10 9AB (What 3 words: stars.stones.energetic) and simultaneously on Zoom. There is plenty of parking space around the venue which is free after 18:00
Einstein’s General Relativity is the accepted theory of gravity that determines the history of our universe – so why change? The problem is that the universe we observe is filled with all kinds of matter and energy that is not included in our standard model of Particle Physics. These unknowns are often called Dark Matter and Dark Energy, but having unknown – and unobserved – particles is unnerving! Instead, gravitational physicists also ask the question: What if General Relativity is not the way gravity behaves on cosmological scales? Modified gravity is a compelling alternative to postulating unknown particles or energy, and I will explain why the need to have some unknown Physics arises and how adding dark materials or changing gravity can help. Finally, I will discuss how we can tell the difference! Ruth Gregory Ruth Gregory is currently Professor of Theoretical Physics and Head of Department at King’s College London. Her fields of specialisation are General Relativity and Cosmology. She earned her PhD from DAMTP, Cambridge in 1988, as a member of Stephen Hawking’s Relativity research group. She was then a Research Associate at the Fermi National Accelerator Laboratory, and a McCormick Fellow at the Enrico Fermi Institute, University of Chicago between 1988 and 1993, before moving back to the UK on PPARC, then Royal Society, Research Fellowships. In 2005 she was appointed Professor of Mathematics and Physics at Durham, moving to King’s College London at the start of 2021. In 2006, she was awarded the Maxwell Medal by the Institute of Physics, and in 2011 received a Royal Society Wolfson Merit Research Award. She is also a visiting fellow at the Perimeter Institute for Theoretical Physics where she lectures as part of the PSI Masters program.
Hertford Dark Sky Event Thursday 22nd February 2024
Astro Photography Section 12th March Patrick Cosgrove Cosgrove’s Cosmos on Youtube and website: cosgrovescosmos.com
More information …. More information …. Photos! Photos!
My Telescope Doesn’t Work! Have you got a telescope that doesn’t seem to do what you thought it would/should? If so then this meeting could be the answer to your prayers. Saturday 16th March Bramfield Village Hall SG15 2QL
More information …. More information ….
Next Meeting: Wednesday March 13th at 8:00pm Beyond Einstein and Modifying Gravity (or.. the Pizza that nobody ordered!) Ruth Gregory Live Session T&Cs apply
Blinking text HTML
Einstein’s General Relativity is the accepted theory of gravity that determines the history of our universe – so why change? The problem is that the universe we observe is filled with all kinds of matter and energy that is not included in our standard model of Particle Physics. These unknowns are often called Dark Matter and Dark Energy, but having unknown – and unobserved – particles is unnerving! Instead, gravitational physicists also ask the question: What if General Relativity is not the way gravity behaves on cosmological scales? Modified gravity is a compelling alternative to postulating unknown particles or energy, and I will explain why the need to have some unknown Physics arises and how adding dark materials or changing gravity can help. Finally, I will discuss how we can tell the difference! Ruth Gregory Ruth Gregory is currently Professor of Theoretical Physics and Head of Department at King’s College London. Her fields of specialisation are General Relativity and Cosmology. She earned her PhD from DAMTP, Cambridge in 1988, as a member of Stephen Hawking’s Relativity research group. She was then a Research Associate at the Fermi National Accelerator Laboratory, and a McCormick Fellow at the Enrico Fermi Institute, University of Chicago between 1988 and 1993, before moving back to the UK on PPARC, then Royal Society, Research Fellowships. In 2005 she was appointed Professor of Mathematics and Physics at Durham, moving to King’s College London at the start of 2021. In 2006, she was awarded the Maxwell Medal by the Institute of Physics, and in 2011 received a Royal Society Wolfson Merit Research Award. She is also a visiting fellow at the Perimeter Institute for Theoretical Physics where she lectures as part of the PSI Masters program.
2024 Hertford Astronomy Group
Hertford  Astronomy Group