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astrophysics

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Q&A

From Einstein’s Theory to Gravity’s Chirp

By Natalie Wolchover
February 18, 2016
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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

By Natalie Wolchover
February 11, 2016
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Ripples in space-time have been detected a century after Einstein predicted them, launching a new era in astronomy.

Q&A

The Case for Complex Dark Matter

By Liz Kruesi
August 20, 2015
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The physicist James Bullock explains how a complicated “dark sector” of interacting particles may illuminate some puzzling observations of the centers of galaxies.

cosmology

Why the Big Bang’s Light May Have a Tilt

By Maggie McKee
June 30, 2015
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Scientists haven’t tested the Big Bang’s light for a revealing shift in 25 years. A new experiment aims to change that.

astrophysics

The Particle That Broke a Cosmic Speed Limit

By Natalie Wolchover
May 14, 2015
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Physicists are beginning to unravel the mysteries of ultrahigh-energy cosmic rays, particles accelerated by the most powerful forces in the universe.

astrophysics

Strange Stars Pulse to the Golden Mean

By Natalie Wolchover
March 10, 2015
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Nature has revealed peculiar mathematical objects that connect order and chaos.

cosmology

Joint Dust Analysis Deflates Big Bang Signal

By Natalie Wolchover
January 30, 2015
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No definitive evidence for cosmic inflation is found, but support remains strong for the theory even as critics highlight its shortcomings as an explanation for how and why the universe began.

astrophysics

Dwarf Galaxies Dim Hopes of Dark Matter

By Natalie Wolchover
October 25, 2014
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For five years physicists have been tantalized by possible evidence of dark matter in the Milky Way’s center. But new results from small satellite galaxies have complicated the story.

BICEP2 graphic.
cosmology

‘Big Bang Signal’ Could All Be Dust

By Natalie Wolchover
September 21, 2014
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Cosmic dust in the high latitudes of the Milky Way could account for the entire swirl pattern that had been presented as proof of a leading Big Bang theory, according to a new data analysis from the Planck satellite.


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