In 2017, the Solar System was visited by an object named ‘Oumuamua, which came from another star. The unusual properties of this first interstellar visitor led some to suggest it may be an alien spacecraft – but the truth is that its oddness is already teaching us lessons about how solar systems form. This lecture […]
Read more "‘Oumuamua: Our first interstellar visitor"This lecture presented the rich history of musicians’ engagement with pitch. From the tuning systems of Babylon, Pythagoras and Hindustani ragas, through the temperaments of the Baroque and Classical eras and arriving at contemporary electronic, blues, jazz and global practices, the lecture explored how musicians have organised, sliced and manipulated the pitch continuum for expressive […]
Read more "The Art and Science of Tuning"Climate change is already affecting us all, regardless of where we live, through changing risks of extreme weather events. This lecture took a break from global climate policy to talk about the links between climate and weather, chaos theory and the practical tools available to quantify changing risks. There is a lot we still don’t […]
Read more "How is Climate Change Affecting The Weather Now"Nuclear, radiological and chemical incidents have the potential to cause major harm. The risk of nuclear and radiological events causing health effects can usually be significantly reduced by relatively simple measures, which are based on the properties of the chemicals released, especially at a distance from the incident. Chemicals that can cause harm, such as […]
Read more "Reducing harms after Nuclear, Radiological and Chemical Incidents"On the eve of COP28 in Dubai, is the goal of limiting global warming to 1.5°C still alive? What does this mean and is it even possible? Given warming has reached 1.25°C, increasing at around ¼°C per decade, what happens if we miss our target? While every tenth of a degree matters, passing 1.5°C does […]
Read more "Why 1.5°C Matters"Millions of us regularly solve Sudoku puzzles. In this lecture, the mathematics behind them was discussed, and the links to other kinds of number grids, like magic squares and so-called Latin squares, which have been studied for centuries. Latin squares have many applications in areas as diverse as experiment design, algebra and coding theory. https://www.gresham.ac.uk/sites/default/files/transcript/2023-11-21_1300_Hart-T%20%28PDF%29.pdf […]
Read more "The Maths of Sudoku and Latin Squares"The discovery that we live in an ordinary galaxy, one of several hundred billion in the observable Universe, instigated a profound change in thinking about our place in the Universe. This first lecture covered the Great Debate of the early twentieth century as new telescopes and new ways of observing the cosmos put our Milky […]
Read more "Island Universes: Discovering Galaxies Beyond the Milky Way"During 2015 I was lucky to see a National Theatre play about J Robert Oppenheimer and I wrote about it here https://wordpress.com/post/helenthehare.org.uk/13072 I am a retired physics teacher and I try to keep up with everything physics so I made a point of seeing Christopher Nolan’s 2023 film about J Robert Oppenheimer https://en.wikipedia.org/wiki/Oppenheimer_(film) https://www.imdb.com/title/tt15398776/ https://youtu.be/bK6ldnjE3Y0 […]
Read more "Oppenheimer, The Film"Wed, 31 May 2023 The Universe is expanding, increasingly so. Will this persist or will it collapse back on itself? If it does expand forever, what happens to the galaxies? What is the long-term trajectory for the ultimate in collapsed matter, black holes? Part of: Cosmic Conclusions https://podcast.gresham.ac.uk/1904814/13023258 Astronomy Physics Science Professor Katherine Blundell OBE […]
Read more "Cosmic Conclusions – The End of the Universe"
helen the hare 