Wes Mountain/The Conversation
It's taken centuries for our understanding of gravity to evolve to where it is today, culminating in the discovery of gravitational waves, as predicted by Albert Einstein a century ago.
Oh hey, I heard ripples in space and time, generated as two black holes merged. Call me back.
Here's a LIGO insider's description of how he got the news of a phenomenon that had first been theorized 100 years ago.
Computer simulation of two merging black holes producing gravitational waves.
If you understand how a trampoline works, you'll be able to understand what gravitational waves are.
The 4km long arms of the LIGO experiment at Hanford.
LIGO lab: www.ligo.caltech.edu
A glimpse inside a truly extraordinary experiment.
2015 saw us complete our exploration of all nine planets (including dwarf planet Pluto) in our solar system.
2015 was a year where we expanded our view of the universe, embraced new technologies and got a hint of the profound changes to come.
© 2014 Lucasfilm Ltd. & TM
Four decades later, I find myself surveying 13 billion years of cosmic history and mapping events that really did happen a long time ago in galaxies far, far away.
Albert Einstein wrestled with unifying gravity with electromagnetism and quantum mechanics until his dying days.
Oren Jack Turner/Wikimedia Commons
After the triumph of general relativity, Albert Einstein spent the rest of his life chasing a unified theory, which eluded him right up until the end.
Hyperspace may one day be a reality.
Many people think relativity puts a hard speed limit on the universe, but it actually opens up the possibility of faster-than-light travel - if we can overcome some significant practical hurdles.
General relativity isn’t only a powerfully descriptive theory, but there’s a beauty in its elegance.
Einstein's theory of general relativity is a triumph of reason and imagination, of art and science, with a profound beauty of its own.
The fathers of modern physics, including Einstein, Millikan, Planck and others, in debate.
Physicists are working hard to unite Einstein's theory of relativity with quantum mechanics. It's no easy task.
Struggle to understand modern physics? Blame Einstein.
Space, time and space-time: it's all relative.
Take my radically intuitive theory and ‘poof’, general relativity will be disproved.
General relativity challenges our intuitive conception of how space and time work, which might explain why it's such a popular target for crank theorists.
It’s possible that had Einstein not conceived of general relativity, then we’d still be at a loss to explain gravity to this day.
Special relativity was inspired, but it took true genius to conceive of general relativity. Had Einstein not come up with it, it may have taken decades for us to figure it out.
You can feel the weight of an object on Earth because of its mass. But what is mass?
We talk about mass all the time but what is it that actually gives an object mass? And why do some things have mass and others have no mass at all?
General relativity didn’t happen overnight, but took several steps to come to fruition.
This month is the centenary of the general theory of relativity. But how did we get from the absolutism of Newton to the relativity of Einstein?
Dark matter is notoriously hard to detect, but a new experiment might finally shed light on this mysterious substance.
A new detector built deep underground in a gold mine will hopefully unravel the mystery of dark matter.
The dispute between Philipp Lenard and Albert Einstein sheds considerable light on the power of nonscientific concerns to sway scientists.
NASA via Wikimedia Commons
Scientists are not always as scientific as many suppose. Recent well-publicized cases of scientific fraud prove that scientists can be as susceptible to the allures of wealth, power and fame as politicians…
Something very special about this year’s Pi Day.
A special Pi Day this year for those who celebrate this remarkable number on March 14, a date that can be written 3/14. Given 3.14 is Pi to two decimal places, what happens when you add in the year?
Doesn’t matter if it doesn’t work.
Forget about anti-ageing creams and hair treatments. If you want to stay young, get a fast spaceship. That is what Einstein’s Theory of Relativity predicted a century ago, and it is commonly known as “twin…
The made up mysteries of dark matter may now be not needed.
Astronomers have been searching for a mysterious substance called “dark matter” since the 1930s. Most scientists still believe it exists, despite many fruitless decades. Now we propose a new theory of…