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What's up in
gravity
astrophysics
Colliding Black Holes Tell New Story of Stars
Just months after their discovery, gravitational waves coming from the mergers of black holes are shaking up astrophysics.
astrophysics
After Black Holes Collide, a Puzzling Flash
A satellite spotted a burst of light just as gravitational waves rolled in from the collision of two black holes. Was the flash a cosmic coincidence, or do astrophysicists need to rethink what black holes can do?
Q&A
From Einstein’s Theory to Gravity’s Chirp
The path from a revolutionary set of equations to the detection of gravitational waves was strewn with obstacles and controversy, explains the physicist Daniel Kennefick — and the struggle continues.
astrophysics
Gravitational Waves Discovered at Long Last
Ripples in space-time have been detected a century after Einstein predicted them, launching a new era in astronomy.
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