(Phys.org) —Is it possible that a moving object could have zero energy? The common sense answer is no, since motion itself is kinetic energy, but this answer has been challenged recently by the concept of quantum time crystals. ...
By analyzing data from NASA's Rossi X-ray Timing Explorer (RXTE) satellite, astronomers have detected millihertz quasi-periodic oscillations from a low-mass neutron star X-ray binary designated EXO 0748−676. The finding ...
(Phys.org) -- Last year, astronomers discovered a quiescent black hole in a distant galaxy that erupted after shredding and consuming a passing star. Now researchers have identified a distinctive X-ray signal observed in ...
Astronomy
Aug 2, 2012
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Using Owens Valley Radio Observatory (OVRO), astronomers have detected a periodic signal in the radio light curve of the blazar J1043+2408, which could be helpful in improving our understanding about the nature of blazars ...
New evidence of sea-level oscillations during a warm period that started about 125,000 years ago raises the possibility of a similar scenario if the planet continues its more recent warming trend, says a research team led ...
Earth Sciences
Sep 11, 2011
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Using data from the Rossi X-ray Timing Explorer (RXTE) satellite, astronomers from the Florida Institute of Technology have discovered a quasi-periodic oscillation (QPO) in the galaxy NGC 4945. The finding, reported in a ...
Astronomers from Australia and Taiwan report the discovery of millihertz quasi-periodic oscillations in a neutron-star low-mass X-ray binary known as 1RXS J180408.9−342058. The discovery, detailed in a paper published September ...
(PhysOrg.com) -- A Cepheid star is one whose mass and age results in physical conditions that generate periodic oscillations in its photosphere. A Cepheid thus varies regularly in brightness, with a period proportional to ...
Astronomy
May 28, 2010
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Using a 218-year-long temperature record from a Bermuda brain coral, researchers at the Woods Hole Oceanographic Institution (WHOI) have created the first marine-based reconstruction showing the long-term behavior of one ...
Earth Sciences
Jan 13, 2009
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People have long known that bat guano - the polite term for what the flying mammals leave on the floors of caves where they live worldwide - is a valuable source of fuel and fertilizer, but now newly published research from ...
Earth Sciences
Oct 26, 2017
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