Astronomers have for the first time detected the background hum of gravitational waves likely caused by merging black holes.
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By timing radio pulses from an array of galactic pulsars, scientists see hints of gravitational waves from supermassive black hole pairs in a breakthrough that may reveal hidden details of galaxy evolution.
Upgrades to the hardware and software of the advanced observatory should allow astrophysicists to detect much fainter gravitational waves than before.
Black holes could take us to the future, and maybe even the past. The hard part would be surviving the trip.
An astrophysicist explains what wormholes are and how these theoretical space-time tunnels have popped up in the solutions to a set of decadesold equations.
Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
Top contributors
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Associate Professor, Philosophy of Science, The University of Melbourne
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Professor of Physics, Penn State
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Associate Professor of Physics, Oklahoma State University
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Professor of Physics, University at Buffalo
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Postdoctoral researcher in pulsar timing and gravitational waves, Swinburne University of Technology
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Research scientist, CSIRO
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University Distinguished Professor of Astronomy, University of Arizona
