Albert Einstein's theory of special relativity explains how space and time are linked, but it doesn't include acceleration. By including acceleration, Einstein later developed the theory of general relativity, which explains how massive objects in the cosmos distort the fabric of space-time. The theory explains how this distortion is felt as the force of gravity, as it predicts how much the mass of an object curves space-time. Scientists test relativity by observing objects in space and seeing if their behaviors match up with Einstein's explanations of space-time and gravity, for instance by observing how light bends around massive objects as it travels towards Earth.
The team that made the first-ever direct detection of gravitational waves has just won a special $3 million Breakthrough Prize.
Sometimes, a flaw in your magnifying glass can be a good thing; in this case, it can even reveal invisible dark-matter galaxies.
Astronomers have observed a supermassive black hole in a distant quasar and made a stunning discovery — it's spinning one-third the speed of light.
Members of the LIGO collaboration testified before Congress today, discussing the discovery's wide-reaching benefits.
Now the elusive ripples in spacetime have been found, scientists are planning for a rich future for using gravitational wave observatories to unmask the warped side of cosmos.
Black hole theoretical physicist Stephen Hawking has some thoughts on the discovery of gravitational waves.
The merging black holes generated a gravitational wave signal from 1.3 billion light-years away -- but which direction did they come from?
The first-ever direct detection of gravitational waves will open up an entirely new window on the universe, researchers say.
Neil deGrasse Tyson took the stage at Columbia University to speak after a historic result was revealed: the first direct detection of gravitational waves.
Read all about the mysterious spacetime ripples known as gravitational waves, and what their detection means for astronomy.
To spot gravitational waves directly for the first time ever, scientists had to measure a distance change 1,000 times smaller than the width of a proton. Here's how they did it.
Studying the ripples in space-time known as gravitational waves could allow astronomers to open a new window on the universe.
Black holes may have hair made up of zero-energy gravitons and photons, meaning they may preserve information, research suggests.