Christopher Wren’s Cosmos

Sir Christopher Wren was one of the most remarkable Gresham Professors of Astronomy. Though best known today as the architectural mastermind behind the rebuilding of London after the Great Fire, Wren’s appointment to the Gresham chair in 1657 stemmed from his enthusiasm for turning his gaze well above London’s skyline and focussing his attention on […]

The Ocean Physics Behind Net Zero

Tue, 31 Jan 2023 Why is the deep ocean cold? And why does this matter for global warming? Doing the maths with pipes and plumbing, not computers, we explore how processes that keep the deep oceans at frigid Arctic temperatures also determine how fast the world is warming in response to rising greenhouse gas concentrations […]

Microbial Megastructures

Invisible microbes have created some of the largest structures on the planet. Mycorrhizal fungi form extraordinary subterranean networks that associate symbiotically with plant roots. Most land plants, including many human crops, need mycorrhizae for optimal growth, but recent research has shown they also play important roles in forest-wide communication and may even turn some trees […]

The Maths of Game Theory

When we buy, sell, bargain, barter, bid at auctions, and compete for resources, we want to be sure that we are using the best strategies. Game theory can help us understand precisely these kinds of situations. That’s why in 1994, the Nobel Prize for Economics was won by a mathematician – John Nash. Using games […]

The End of Our Sun

Our nearest star, that is the engine sustaining life on Earth, will one day run out of fuel. When this happens, the Sun will start expanding dramatically, forming a red giant and engulfing much of the solar system including the inner planets, vaporizing oceans; formerly icy planets will become habitable. Part of: Cosmic Conclusions This […]

The Surprising Uses of Conic Sections

https://www.gresham.ac.uk/sites/default/files/transcript/2022-04-25-1300_HART-T.pdf https://youtu.be/qFSN6XePEyw Conic sections – the curves made by slicing through cones at various angles – were studied by the ancient Greeks, but because of their useful properties, have many real-world uses. Planets have elliptical orbits, projectiles move in parabolas, and cooling towers have hyperbolic cross-sections. But did you know that one of the most […]

The geological record of climate change

Professor Christopher Jackson The Earth is warming, and dangerously so. But is this unusual? Have there been times in the past when the Earth has been very hot or perhaps, very cold? And if so, what caused this, and what did these changes in climate mean for life on Earth? In this talk Professor Christopher […]

Planetary Universe

Professor Katherine Blundell OBE How can new worlds be discovered, and how many exo-planets might be out there? What does today’s technology in astronomical observatories now enable, and what is it that holds us back from finding what is actually out there? What hinders us from pushing forwards the frontiers of space science? https://youtu.be/1GaeKxYbWYA This […]

The Beauty of Geometrical Curves

The path traced out by a given point on the rim of a circle as you roll it along a straight line is a beautiful curve called a cycloid, whose appeal to mathematicians has had it dubbed “the Helen of Geometry”. This curve is known in geometry as a roulette, which is a curve you […]

Magnetic Universe

Professor Katherine Blundell OBE https://www.physics.ox.ac.uk/our-people/blundell https://www.sjc.ox.ac.uk/discover/people/professor-katherine-blundell/ https://en.wikipedia.org/wiki/Katherine_Blundell https://uk.linkedin.com/in/katherine-blundell https://twitter.com/prof_katherine?lang=en Professor Blundell was appointed Gresham Professor of Astronomy in 2019. She is a Professor of Astrophysics at Oxford University and a Research Fellow at St John’s College. Before this she was one of the Royal Society’s University Research Fellows, a Research Fellow of the 1851 Royal […]

helen the hare

Author: helenthehare