Three scientists have won the 2020 Nobel prize in physics for their work on black hole formation and the discovery of a supermassive black hole at the centre of our galaxy.
In high-energy particle collisions we study the smallest known constituents of matter. According to our best knowledge of physics, these constituents have mass only because of the way they interact with a unique quantity which permeates all of space. This quantity, like practically everything else in the strange world of the very small, is a quantum field.
Prof Claudia de Rham’s ‘massive gravity’ theory could explain why universe expansion is accelerating
Objects raise hopes of scientists managing to track ‘blobs’ being swallowed by black hole
A number of bizarre shape-shifting objects have been discovered close to the supermassive black hole at the centre of the Milky Way.
The blobs are thought to be giant stars that spend part of their orbits so close to the black hole that they get stretched out like bubble gum before returning to a compact, roughly spherical form.
The detection of gravitational waves scooped the 2017 Nobel physics prize. But in a Perimeter Institute lecture Erik Verlinde proposes a rather different theory of gravity
A public lecture and interactive webcast by Amanda Peet
What do you ask the man who knows everything? The theoretical physicist and bestselling author answers questions from famous fans and Observer readers
The particles of which the universe is made don’t much care which way time goes. But we do, and so do the stars and the planets.