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Black holes

Black holes wobbling three times a second have proved Einstein right

12 October 2022

A pair of merging black holes show extreme signs of gravity-induced orbital precession, or wobbling, as predicted by Albert Einstein's theory of general relativity


CNES Satellite Illustration

Einstein's gravity principle still correct, finds most precise test

14 September 2022

An experiment conducted on a satellite in orbit found that Albert Einstein's ideas about gravity are still correct, with measurements accurate to one part in a quadrillion


Across the universe. Traveling in space. Time travel. Elements of this image furnished by NASA.; Shutterstock ID 200832383; purchase_order: -; job: -; client: -; other: -

Why general relativity is known as a background independent theory

3 August 2022

Space-time isn't expanding into anything because general relativity is what we call a background independent theory. Chanda Prescod-Weinstein sets out to explain what this means


Spiral galaxy and black hole, computer illustration.

Hot plasma mirror may help solve Stephen Hawking’s black hole paradox

3 June 2022

A few particles of light bouncing off a flying mirror made of charged particles may reveal whether or not black holes destroy information, a famous problem in physics


Black hole

First picture of our galaxy’s supermassive black hole revealed

12 May 2022

The Event Horizon Telescope collaboration has released the first picture of our galaxy’s supermassive black hole, Sagittarius A*, and it’s just as predicted


JILA researchers measured time dilation, or how an atomic clock's ticking rate varied by elevation, within this tiny cloud of strontium atoms.

Most precise atomic clock shows Einstein’s general relativity is right

16 February 2022

Physicists have measured time dilation on the smallest scale ever using an atomic clock made of thousands of ultracold atoms formed into a stack of pancake-shaped blobs


This image show stars orbiting very close to Sgr A* (centre), the supermassive black hole at the heart of the Milky Way. They were obtained with the GRAVITY instrument on ESO???s Very Large Telescope Interferometer (VLTI) at the end of March 2021.

We’ve seen our galaxy’s huge black hole more clearly than ever before

14 December 2021

Astronomers have observed Sagittarius A* – the supermassive black hole at the centre of our galaxy – closer than ever before, and Albert Einstein’s general theory of relativity still holds up


Artistic impression of the Double Pulsar system

A pair of pulsars in a tight embrace have proved Einstein right again

13 December 2021

After monitoring a pair of pulsars in tight orbit around one another for 16 years, astronomers conclude that their behaviour is consistent with Einstein’s predictions


Black hole

X-rays can echo and bend around the back of supermassive black holes

28 July 2021

Flashes of X-rays have been spotted echoing from behind a supermassive black hole, confirming one of the predictions of Albert Einstein’s general theory of relativity


A warp drive that doesn't break the laws of physics is possible

A warp drive that doesn't break the laws of physics is possible

3 March 2021

Previous ideas for warp drives have required types of matter that do not seem to exist, but a new concept could allow them to be made without any imaginary substances


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