Gravitational waves are ripples in space-time created by the interaction of massive objects in space, such as black holes and neutron stars. Their existence was first predicted by Albert Einstein in his 1916 paper describing his theory of general relativity. In 2015, scientists made the first detection of gravitational waves, observing ripples from the collision of two black holes. The discovery won astrophysicists Kip Thorne, Barry Baris and Rainer Weiss the 2017 Nobel Prize for Physics. Subsequent observations have also detected gravitational waves from colliding neutron stars. Learn more about gravitational waves here.
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.
Gravity waves, gravitational waves and primordial gravitational waves... what do they mean? Is there a difference?
More gravitational wave discovery rumors are flying, but this time they've taken a specific – and, possibly, really exciting – new twist.
So are we likely to ever find gravitational waves? And would they really provide irrefutable evidence for the Big Bang? Here are five common myths and misconceptions about gravitational waves.
The discovery that space and time combine to make a single continuum has permitted numerous breakthroughs in physics. Will scientists ever understand it at the small-scale levels?
A quest to find ripples in space-time took a major step forward this week when the European Space Agency successfully launched the LISA Pathfinder mission into space.
This computer simulation shows what two merging black holes would look like — gravitational waves rippling away from the impact.
Our universe is actually really simple, it's just our cosmological theories that are getting needlessly complex, argues one of the world's leading theoretical physicists.
Two black holes, circling one another on their way to merging together, can create ripples in spacetime, but the waves are weaker than previously thought.