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Tag archives: Einstein

Earth-gazing, a very noteworthy astronomer, chilling with Einstein and more

The Earth as seen by Himawari-8 earlier today. (Courtesy: JSA)

The Earth as seen by Himawari-8 earlier today. (Courtesy: JSA)

By Hamish Johnston

Who hasn’t wanted to float high above the Earth and gaze down on our planet as sunlight and clouds dapple across its surface. Thanks to the “Glittering Blue” animation, such views are not just for a privileged few astronauts. This stunning animation of one day’s observations from the Japanese weather satellite Himawari-8 has been put together by satellite-imagery analyst Charlie Lloyd. He has also included a nice FAQ page that explains some of the amazing phenomena captured by the satellite, including a huge tropical storm and the daily cloud cycles of a rainforest.

You can read more about Lloyd and the images in The Atlantic article “A New and Stunning Way to See the Whole Earth”. If you want to know what Himawari-8 is seeing right now, it has its own live webcam.

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The life and times of Einstein – ‘A vagabond and a wanderer’

Falling in: Sir Roger's sketch of a black hole collapse, at his talk (Courtesy: Tushna Commissariat)

Falling in: Sir Roger Penrose’s sketch of a black-hole collapse. (Courtesy: Tushna Commissariat)

By Tushna Commissariat

So much has been said about Einstein and his general theory of relativity (GR) that one would assume there isn’t two entire days worth of talks and lectures that could shed new light on both the man and his work. But that is precisely what happened last weekend at Queen Mary University London’s “Einstein’s Legacy: Celebrating 100 years of General Relativity” conference, where a mix of scientists, writers and journalists talked about everything from the “physiology of GR” to light cones and black holes, to M-theory and even GR’s “sociological spin-offs”.

The opening talk, “Not so sudden genius”, was given by journalist and author of “Einstein: A hundred years of relativity“, Andrew Robinson. The talk was very fascinating and early on Robinson outlined that Einstein stood on the shoulders of many scientists and not just “giants” such as Newton and Mach. But he also acknowledged that the scientist was always a bit of a loner and he preferred it this way. Robinson rightly pointed out that until 1907, Einstein was “working in brilliant obscurity” and later, even once fame found him, rootlessness really suited Einstein’s personality – he described himself as “a vagabond and a wanderer”.

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Celebrating the centenary of Einstein’s general theory of relativity and asking what theorists have done lately

 

By Hamish Johnston

This week, people all over the world have been celebrating the 100th anniversary of Einstein’s general theory of relativity (GR). Einstein delivered his theory this week in November 1915. Not surprisingly, the Web has been buzzing with tributes to Einstein and explanations of his theory.

In the above video, the physicist Brian Greene and two young assistants demonstrate Einstein’s explanation of gravity using a huge piece of stretched Spandex. Why they have this Spandex ring in what appears to be their living room remains a mystery, but it and a large number of marbles do the trick when it comes to explaining GR.

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Einstein’s legacy, 100 years on

 

By Tushna Commissariat

As readers of Physics World, you probably don’t need me to tell you that this year marks 100 years since legendary physicist Albert Einstein laid the foundations for his revolutionary general theory of relativity (GR). This month marks the exact time when he began giving a series of four weekly lectures – the first of which was on 4 November 1915 – to the Prussian Academy of Sciences in Berlin. Indeed, today is the centenary of the final lecture, when he presented his “Field equations of gravitation”. In the video above, philosopher and one-time physicist Jürgen Renn, from the Max Planck Institute for the History of Science in Berlin, gives a short and sweet explanation of GR and its impact on physics.

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Physicists in motion: immigration and the Nobel prize

PW-2015-09-30-blog-migration

Around the world: how has immigration shaped the global physics community? (Courtesy: iStockphoto/Joel Carillet)

By Hamish Johnston

In December 1938 Enrico Fermi travelled to Stockholm, where he was presented with that year’s Nobel Prize for Physics for his insights into the atomic nucleus. But after the ceremony, Fermi did not return to his native Italy. Instead, he joined his wife and young children on a voyage to the US. Fermi went on to make major contributions to physics in that country – including playing crucial roles in developing nuclear weapons and nuclear energy.

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The ins and outs of black holes and a new way of thinking about general relativity

 

By Hamish Johnston

While at the Convergence conference at the Perimeter Institute (PI), Physics World’s Louise Mayor and I had dinner with Sean Gryb. He did his PhD at the PI and is now doing a postdoc at Radboud University Nijmegen in the Netherlands. In the above video he shares some of his highlights of the conference.

Gryb is working on “shape dynamics”, which is a new idea for re-evaluating Albert Einstein’s general theory of relativity (GR). The idea was initiated by Julian Barbour and Gryb became involved in the development of shape dynamics while he was at PI. He now belongs to a small international band of physicists who are developing the concept. While shape dynamics is an alternative treatment of GR, the ultimate goal of their work seems to be the creation of a new framework for a theory of quantum gravity – an important goal of theoretical physics.

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Debating warp bubbles and quark novae over beer and samosas

Photograph of Miguel Alcubierre lecturing in Edmonton

Time traveller: Miguel Alcubierre works the crowd in Edmonton.

By Hamish Johnston at the CAP Congress in Edmonton, Canada

The first day of the Canadian Association of Physicists (CAP) Congress at the University of Edmonton closed yesterday on the theme of time travel. Surely that is science fiction, you are thinking? But Miguel Alcubierre of the National Autonomous University of Mexico (UNAM) wasn’t joking when he delivered the Herzberg Memorial Lecture yesterday evening (although he did giggle a lot during his talk, which was very endearing). The session was called “Faster than the speed of light” and it was a fascinating romp through some of the more bizarre implications of Einstein’s general theory of relativity (GR) – which is 100 years old this year.

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The admiral of the string-theory wars, add-male-author-gate, the Einstein font and more…

Xxxx Particle Zoo. (Courtesy: CERN)

Julie Peasley, creater of the Particle Zoo. (Courtesy: CERN)

By Hamish Johnston

Peter Woit is lauded by some for having the courage to speak the truth to the physics establishment, while others see him as an enemy of science. Woit writes the Not Even Wrong blog, which has the same title as a controversial book he once wrote about the merits of string theory. In an article in the latest issue of Nautilus, Bob Henderson profiles Woit and his three decades of doubt over various incarnations of the theory that culminated about 10 years ago in the “string wars”. Henderson’s article is called “The Admiral of the String Theory Wars” and provides a fascinating insight into how the rise of string theory caused Woit to switch from physics to mathematics and his relationships with string theorists – some of whom work in the same building as Woit at Columbia University.

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Villainous physicists, Hubble’s cat and more

Eddie Redmayne as Stephen Hawking

Eddie Redmayne as Stephen Hawking in the film The Theory of Everything. (Courtesy: Universal Pictures International)

By Tushna Commissariat

This week we heard about a possible new James Bond film villain and its none other than Stephen Hawking. According to this story in the Telegraph, he feels as if his trademark wheelchair and computerized voice would lend themselves perfectly to the part. On the same note, we saw this interesting feature on the Wired website that looks at the history behind Hawking’s very recognisable voice. Last month, I was lucky enough to attend an early screening of James Marsh’s Hawking biopic The Theory of Everything, which includes a rather touching and funny scene of Hawking testing out his voice for the first time. You can read more about the film in the reviews section of the upcoming January issue of Physics World.

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Quantum landscaping

USPS.jpg
Artist’s impression of a map of the Quantum Universe (Graphic courtesy of “ILC — form one visual communication”)

By Tushna Commissariat

Here’s a bit of Friday physics fun… I came across this rather interesting image that shows an artist’s impression of a map entitled “The Quantum Universe”. It includes six landmasses all floating in the Big Bang Ocean; including Dark Matter Landmass, Sypersymmetry Reef, Higgs Island and the Land of Ultimate Unification as well as others.

So go ahead and tell us which island you would like to settle down on. Be sure to look carefully at gems like Newton’s Lawn and Mount Einstein before you make your mind up!

To see a larger hi-res image follow this link.

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