gravitational wave
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enCosmology breakthrough raises new questions
https://plus.maths.org/content/cosmology-breakthrough-raises-new-questions
<p>Yesterday cosmologists at the University of Cambridge delivered their verdict on a major breakthrough that rocked science this week: the announcement of the <a href="http://bicepkeck.org/">BICEP2</a> project of direct evidence for an inflationary theory of the Universe and the existence of gravity waves (see <a href="https://plus.maths.org/content/first-swirling-glimpse-inflation-and-gravity-waves">here</a> for our report).<p><a href="https://plus.maths.org/content/cosmology-breakthrough-raises-new-questions" target="_blank">read more</a></p>https://plus.maths.org/content/cosmology-breakthrough-raises-new-questions#commentscosmological inflationcosmologygravitational wavetheory of inflationThu, 20 Mar 2014 11:13:24 +0000mf3446067 at https://plus.maths.org/contentA first swirling glimpse of inflation and gravity waves
https://plus.maths.org/content/first-swirling-glimpse-inflation-and-gravity-waves
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<p>Data from BICEP2 gathered in the South Pole reveals swirls in the CMB, the first image of gravitational waves and evidence for inflation.</p>
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As we sat in a roomful of eager astronomers, cosmologists and theoretical physicists today, while they tried repeatedly and unsuccessfully to connect to a live webcast of what is being called by some "the discovery of the century" , we began to suspect that it might well be easier to detect gravitational waves from the early Universe than a livefeed from Harvard.
</p><p><a href="https://plus.maths.org/content/first-swirling-glimpse-inflation-and-gravity-waves" target="_blank">read more</a></p>https://plus.maths.org/content/first-swirling-glimpse-inflation-and-gravity-waves#commentscosmic microwave background radiationcosmologygravitational waveinflationMon, 17 Mar 2014 18:48:32 +0000Rachel6064 at https://plus.maths.org/contentA matter of gravity
https://plus.maths.org/content/matter-gravity
<div class="rightimage" style="width: 350px;"><img src="https://plus.maths.org/content/sites/plus.maths.org/files/blog/022014/snowboarder_in_halfpipe.jpg" alt="Snowboarder" width="350" height="233" />
<p>Snowboarders are vulnerable to gravity. Image: <a href="http://commons.wikimedia.org/wiki/File:Snowboarder_in_halfpipe.jpg">Picswiss.ch</a>.</p><p><a href="https://plus.maths.org/content/matter-gravity" target="_blank">read more</a></p>https://plus.maths.org/content/matter-gravity#commentsgeneral relativitygravitational wavegravitational wave detectorgravityinverse square lawspecial relativityThu, 27 Feb 2014 15:58:39 +0000mf3446051 at https://plus.maths.org/contentWhen black holes collide
https://plus.maths.org/content/hear-black-holes-collide
<p>You're unlikely to ever run into a black hole, but here's what it "looks" and "sounds" like when two black holes run into each other. The movie below, produced by <a href="http://physics.princeton.edu/~fpretori/">Frans Pretorius</a> at Princeton University, shows a simulation of the gravitational waves generated when two black holes collide and form a third. Gravitational waves are ripples in the fabric of spacetime, resulting from events involving massive objects which distort spacetime. The waves were predicted by Einstein's theory of gravity.<p><a href="https://plus.maths.org/content/hear-black-holes-collide" target="_blank">read more</a></p>https://plus.maths.org/content/hear-black-holes-collide#commentsblack holegravitational wavegravityWed, 03 Nov 2010 16:42:52 +0000mf3445348 at https://plus.maths.org/contentHow does gravity work?
https://plus.maths.org/content/how-does-gravity-work
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And what are gravitational waves? </div>
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<div class="pub_date">29/09/2009</div>
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<p>B.S. Sathyaprakash</p><p><a href="https://plus.maths.org/content/how-does-gravity-work" target="_blank">read more</a></p>https://plus.maths.org/content/how-does-gravity-work#commentsastronomyblack holecosmologyEinsteingeneral relativitygravitational wavegravitational wave detectorgravityinternational year of astronomy 2009Newtonspecial relativityMon, 28 Sep 2009 23:00:00 +0000plusadmin2827 at https://plus.maths.org/contentSqueeze me, stretch me
https://plus.maths.org/content/squeeze-me-stretch-me
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Anita Barnes </div>
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Did you know that every instant, gravity waves from outer space are stretching and squeezing you - and everyone and everything else in the universe? Learning more about this mysterious radiation will help us to probe the structure and origins of the universe, explains <b>Anita Barnes</b>. </div>
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<div class="pub_date">March 2004</div>
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<p><i>At this very moment, disturbances from outer space are stretching and squeezing you. Knowing exactly when and by how much you are squashed or stretched will enable humans to learn much more about our universe, perhaps even telling us more about the Big Bang, or shedding light on the mystical "dark matter" that is posited to exist in huge quantities throughout the universe.</i></p>
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https://plus.maths.org/content/faster-falling-bullet
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Scientists have for the first time measured the speed of gravity and tested Einstein's assumption - or have they? </div>
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<div class="pub_date">07/03/2003</div>
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<p>The idea that gravity has a speed seems strange - ever since Newton's day it has been assumed that the gravitational force of an object is felt instantaneously.<p><a href="https://plus.maths.org/content/faster-falling-bullet" target="_blank">read more</a></p>https://plus.maths.org/content/faster-falling-bullet#commentscosmologygeneral relativitygravitational lensinggravitational wavegravityNewtonian mechanicsrelativityFri, 07 Mar 2003 00:00:00 +0000plusadmin2728 at https://plus.maths.org/contentCatching waves with Kip Thorne
https://plus.maths.org/content/catching-waves-kip-thorne
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The Plus Team </div>
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What happens when one black hole meets another? <b>Professor Kip Thorne</b> shows us how to eavesdrop on these cosmic events by watching for telltale gravitational waves. </div>
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<div class="pub_date">Jan 2002</div>
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<p><em>Kip Thorne has been at the forefront of black hole cosmology since the early 1960s, and currently heads one of the world's leading groups working in relativistic astrophysics. An important emphasis of his research is on black holes and gravitational waves, and developing the mathematics necessary to analyse these objects.</em></p>
<p><em>Professor Thorne gave a talk on "Warping Spacetime" and Rachel Thomas from the <i>Plus</i> team went along and spoke with him about it afterwards.</em><br clear="all" /></p><p><a href="https://plus.maths.org/content/catching-waves-kip-thorne" target="_blank">read more</a></p>https://plus.maths.org/content/catching-waves-kip-thorne#comments18Big Bangblack holecosmic microwave background radiationcurvature of spacegravitational wavegravitational wave detectorgravityinterferencelaser interferometrySchwarzchild singularitySat, 01 Dec 2001 00:00:00 +0000plusadmin2199 at https://plus.maths.org/content