Category Archives: Relativity

Crimson Moon – A Total Lunar Eclipse

A meme showing Lance Corporal Jack Jones, from the fictional Home Guard platoon portrayed in popular British sitcom 'Dad's Army' uttering his familiar catchphrase: "Don't Panic!" with a total eclipse of the Moon appearing crimson red in the background.The Motion of Celestial Spheres

The Universe never sleeps.  Every now and then, the night sky presents us mere mortals with some heavenly spectacle.  A Bonnie Tyler moment.  This Friday, the Moon will enter the catwalk dressed in red to accomplish its otherwise normal nightly travel around the Earth.  For one night only.  A strange and rare celestial sight at dusk – a total lunar eclipse.    Continue reading Crimson Moon – A Total Lunar Eclipse

Time Travel or Quantum Leap – Where Does Bitcoin Meet Relativity?

Artwork showing a Bitcoin symbol being sucked into a gravity well.  Image: NaturPhilosophieBlockchain Oddity

On 19 June 2018, a peculiar number emerged from the blockchain space.  The series of numbers and letters sent the cryptosphere into overdrive, sparking rampant talk of quantum computing breakthroughs, time travel, Satoshi’s return, and the esoteric meaning of Bitcoin.  Continue reading Time Travel or Quantum Leap – Where Does Bitcoin Meet Relativity?

Closer to Midnight… – The Countdown to Doomsday Earth

Artwork for Trinity Event's Doomsday Clock at One Minute Past Twelve.  Digital Image: NaturPhilosophieWhat Time Is It?

No need to be an atomic scientist, when you’re considering the state of the World today, to understand the picture is an alarming one.  Allegorically-speaking, the Earth is now only two minutes away from impending catastrophe.  Continue reading Closer to Midnight… – The Countdown to Doomsday Earth

The Bizarre Behaviour of Negative Mass

"Hokusai's Wavelet", a take on the bouncing droplet in a Getty photograph (see original below). Artwork: NaturPhilosophieObserving Negative Mass at Washington State University

Negative mass has always been theoretically possible, and the concept has finally made it from a mathematical idea on paper to a reality achieved in the lab.  Scientists at Washington State University have created a fluid with negative mass.  Continue reading The Bizarre Behaviour of Negative Mass

2016: Another Year in Cutting Edge Science

A photo-montage showing pictures of the recent scientific developments of the year 2016. From Major Tim Peake's extraordinary space adventure, to the discovery of the missing elements in the Periodic Table, and the gravitational wave detection from a merger of black holes far away in outer space...  Collage: NaturPhilosophieYou Spin Me Right Round…

Just over a century ago, Einstein proposed the existence of waves in the spacetime continuum – the logical deduction from his Theory of General Relativity.  In February 2016, scientists finally announced the detection of those “ripples” in gravity, using the technique of laser interferometry.  Continue reading 2016: Another Year in Cutting Edge Science

Hunting Ripples in the Fabric of Space-Time – The Trials and Tribulations of LISA

Artwork for "Hunting Ripples in the Fabric of Space-Time – The Trials and Tribulations of LISA" showing the LISA space array, with the caption: "Think Again!" Artwork: NaturPhilosophieMeet LISA!

Erm…No.  Not Mona Lisa!  (Rolls eyes.)  Think again!!  This is LISA – the Lisa Pathfinder satellite, the key element for a grand new project: a space-based gravitational observatory.  Continue reading Hunting Ripples in the Fabric of Space-Time – The Trials and Tribulations of LISA

The Discovery of Gravitational Waves – Merging Black Holes and Advanced LIGO

An animation illustrating two colliding and merging black holes in outer space.Black Holes Far Ago Have Been Causing a Stir…

You know how when you throw a rock into a pool, that makes ripples in the water?  And how Einstein once upon a time predicted that the very mass of stars and planets should warp spacetime?  Although we have had a justified inkling that Einstein was right for quite some time, we had never before detected such a phenomenon.  Until THIS happened… Continue reading The Discovery of Gravitational Waves – Merging Black Holes and Advanced LIGO

Lateral Thinking in Science – Who Are You?

A photographic montage showing Laura Dern, Benedict Cumberbatch and Lennie James in various cinematic and TV roles as scientists. The caption asks: "What kind of scientist should you be?"What kind of Scientist are you?

Already this article is beginning to sound like one of those sempiternal quizzes you so often get on social media… but it actually shows how science reality connects.  Are you having a scientific identity crisis? Continue reading Lateral Thinking in Science – Who Are You?

Proving that Physicists were the Original Hipsters

A black and white photograph of Nobel physicist Richard Feynman, pictured smiling in front of the blackboard of a lecture room, which is covered with mathematical equations.Modern-Day Hipsters Take Heed…

With his wind-swept mane, the inimitable Richard Feynman looked devilishly handsome. And he darn-diddly knew it too! As for Fritz Haber, Rosalind Franklin and Neil deGrasse Tyson, they were the original hipsters. That’s according to BuzzFeed anyway… Continue reading Proving that Physicists were the Original Hipsters

Size Matters… in Astrophysical Terms

Little Big Earth and the Universe

Let’s talk about size…  😉  How big are the objects floating in our Universe and how big can they get?  Starting with a “big” object, our very own Moon…  Embark on a tour of space…  A tour of our Universe… Continue reading Size Matters… in Astrophysical Terms

Just a Second…

A close-up photograph of an analog clock showing the hands just reaching the hour.What Does a Second Look Like?

1/60 minute.  1/3,600 hour.  1/86,400 day.  1/1 hertz.  The duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of a 133 55Cs caesium isotope corresponds to one second.  But what does it look like?  And where might you find a second? Continue reading Just a Second…

Physics at 13 TeV – Cranking Up the LHC

A composite picture showing inside the underground tunnel at CERN, and a small portion of the giant particle accelerator in artificial colours, with the words 13 TeV superimposed on it. Image: NaturPhilosophieA Vernesque Feat of Human Engineering

Deep down, in huge subterranean caverns… Underneath the Franco-Swiss border… 300 feet underground… lies a beast of unprecedented power… and mystery.  The Large Hadron Collider (LHC) that man summons to  explore the uncharted corners of the sub-atomic realm…  After two years of a deep slumber, the mighty beast has awoken… Continue reading Physics at 13 TeV – Cranking Up the LHC

The World Outside My Window… What a Window!!

What a World!!

Amazing timelapse footage of the Earth (including aurorae, lightning and city lights) as seen from the International Space Station.  Just mesmerizing…

Published on YouTube on 3 Dec 2013
Images: http://eol.jsc.nasa.gov/
Music: ‘Fill My Heart’ by Two Steps from Hell
Editor: David Peterson

Where The Streets Have No Name

A computer-generated drawing based on a photograph from a typical street in Saragossa, in Spain. Image: NaturPhilosophieAddressing the World

About four billion people on our planet actually live in places with no house numbers,  no street names, or without anything that constitutes a proper address.  They are effectively off-the-map, with no voting rights or access to public utilities.  A new company called What3Words proposes to revolutionise that… Continue reading Where The Streets Have No Name

Geothermics and Gravity – The IRENA Global Atlas for Renewable Energy

A satellite colour map taken from the IRENA Global Atlas for Renewable Energy - Free Air Anomaly Map.Eye on the Energy Sources of the Future

Geothermal energy prospectors have long used gravity meters in their search for the right subsurface characteristics.  But these have been point measurements.  GOCE now provides this information across the World at a resolution never before achieved on that scale.  Continue reading Geothermics and Gravity – The IRENA Global Atlas for Renewable Energy

That Mysterious Missing Matter – Cocktail Party Physics

A 3D animation showing dark matter creation and the large scale structure of the Universe.Dark Matter

“Dark matter?”  You cannot see it.  But there is something there.  As for what it is, it’s anybody’s guess!  Dark matter does not interact with light.  At all.  Which makes it difficult to detect.  But if you cannot see it?  How do you know it is in fact there?”  Well, it does interact with gravity, and as it does so it bends the path of any light ray passing nearby...  “And did it really kill the dinosaurs…?”  Continue reading That Mysterious Missing Matter – Cocktail Party Physics

The Real-Life Space Twin Paradox

A photograph featuring twin astronauts Mark and Scott Kelly in their NASA uniform.Twin Astronauts

A ground-breaking one-year space mission involving twin astronauts Mark and Scott Kelly should help doctors, scientists and mission planners better understand the physical and psychological impacts of a long-duration spaceflight. Continue reading The Real-Life Space Twin Paradox

The Field Equations of General Relativity

An artist's impression of the Earth's gravity field as described in Einstein's General Relativity.

Keeping It Relatively Simple

The Einstein Field Equations of General Relativity are vast and complex, but they can be written with deceptive simplicity.  Using modern notation, the field equations can be formulated as

\boldsymbol G = \frac {- 8 \pi G}{c^4} \boldsymbol T   Continue reading The Field Equations of General Relativity