cosmological constant
https://plus.maths.org/content/taxonomy/term/1043
enDark energy say cheese!
https://plus.maths.org/content/dark-energy-say-cheese
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<p>Images are now being taken on the world's most powerful digital camera. For over 500 nights over the next five years the <em>Dark Energy Camera</em> will photograph the light from more than 100,000 galaxies up to 8 billion light-years away in each image.</p>
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As you flick through your holiday photos while the rain drizzles outside your window, the summer may already seem like a long time ago. But some scientists will soon be looking even further into the past thanks to images now being taken on the world's most powerful digital camera. For over 500 nights over the next five years the <a href="http://www.darkenergysurvey.org/DECam/camera.shtml">Dark Energy Camera</a> will photograph the light from more than 100,000 galaxies up to 8 billion light-years away in each image.<p><a href="https://plus.maths.org/content/dark-energy-say-cheese" target="_blank">read more</a></p>https://plus.maths.org/content/dark-energy-say-cheese#commentsastronomycosmological constantcosmologydark energyTue, 10 Sep 2013 14:09:40 +0000Rachel5938 at https://plus.maths.org/contentBang, crunch, freeze and the multiverse
https://plus.maths.org/content/bang-crunch-freeze-and-multiverse
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Marianne Freiberger </div>
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<p>Some of the things I overheard at Stephen Hawking's 70th birthday conference did make me wonder whether I hadn't got the wrong building and stumbled in on a sci-fi convention. "The state of the multiverse". "The Universe is simple but strange". "The future for intelligent life is potentially infinite". And — excuse me — "the Big Bang was just the decay of our parent vacuum"?!</p>
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<p>Some of the things I overheard at <A href="https://plus.maths.org/content/stephen-hawkings-birthday-package">Stephen Hawking's 70th birthday
conference</a> did make me wonder whether I hadn't got the wrong building
and stumbled in on a sci-fi
convention. "The state of the multiverse". "The Universe is simple
but strange". "The future for intelligent life is potentially infinite". And — excuse me — "the Big Bang was just the decay of our
parent vacuum"?!</p><p><a href="https://plus.maths.org/content/bang-crunch-freeze-and-multiverse" target="_blank">read more</a></p>https://plus.maths.org/content/bang-crunch-freeze-and-multiverse#commentsmathematical realityastronomycosmic microwave background radiationcosmological constantcosmologyexpansion of the universemultiverseMon, 23 Jan 2012 15:30:12 +0000mf3445646 at https://plus.maths.org/contentFrom planets to universes (part II)
https://plus.maths.org/content/planets-universes-part-ii
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Martin Rees </div>
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<p>This is the second part of the lecture given by Astronomer Royal Martin Rees at Stephen Hawking's birthday symposium.</p>
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<p><em>This article is based on a lecture given by Martin Rees at <a href="https://plus.maths.org/content/stephen-hawkings-birthday-package">Stephen Hawking's 70th birthday symposium</a>. It is published here by permission. It's the second part of the article — you can read the first part <a href="https://plus.maths.org/content/planets-universes-part-i">here</a>, but you don't need to in order to understand this one.</em></p><p><a href="https://plus.maths.org/content/planets-universes-part-ii" target="_blank">read more</a></p>https://plus.maths.org/content/planets-universes-part-ii#commentsmathematical realityastronomycosmological constantcosmologyexpansion of the universemultiverseMon, 23 Jan 2012 13:40:03 +0000mf3445640 at https://plus.maths.org/contentExploding stars clinch Nobel Prize
https://plus.maths.org/content/exploding-stars-reveal-dark-energy
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<p>This year's Nobel Prize in Physics was awarded for a discovery that proved Einstein wrong and right at the same time.</p>
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<p>When Einstein formulated his general theory of relativity he noticed something disturbing. According to his equations, gravity should cause the Universe to contract until it eventually collapses in on itself in a big crunch. This idea jarred with Einstein, so he introduced a repulsive component of gravity into his equations which exactly balanced the attractive one, giving an elegantly static Universe. The term became known as the <em>cosmological constant</em>.<p><a href="https://plus.maths.org/content/exploding-stars-reveal-dark-energy" target="_blank">read more</a></p>https://plus.maths.org/content/exploding-stars-reveal-dark-energy#commentsmathematical realitycosmological constantdark energyexpansion of the universeNobel prizeThu, 06 Oct 2011 08:20:17 +0000mf3445563 at https://plus.maths.org/contentWhat is dark energy?
https://plus.maths.org/content/what-dark-energy
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What's the mysterious stuff that makes up 70% of our Universe? </div>
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<div class="pub_date">25/08/2009</div>
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<p><i>This article was part of a <A href="https://plus.maths.org/content/seven-things-everyone-wants-know-about-universe">project</a> we ran to celebrate the <a href="http://www.astronomy2009.co.uk/">International Year of Astronomy 2009</a>. The project asked you to nominate the questions about the Universe you'd most like to have answered, and this is one of them. We out it to John D.<p><a href="https://plus.maths.org/content/what-dark-energy" target="_blank">read more</a></p>https://plus.maths.org/content/what-dark-energy#commentsBig Bangcosmological constantcosmologydark energyexpansion of the universeinternational year of astronomy 2009Mon, 24 Aug 2009 23:00:00 +0000plusadmin2534 at https://plus.maths.org/contentLambda marks the spot — the biggest problem in theoretical physics
https://plus.maths.org/content/lambda-marks-spot-mdash-biggest-problem-theoretical-physics
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Rachel Thomas </div>
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The mathematical maps in theoretical physics have been highly successful in guiding our understanding of the universe at the largest and smallest scales. Linking these two scales together is one of the golden goals of theoretical physics. But, at the very edges of our understanding of these fields, one of the most controversial areas of physics lies where these maps merge: the cosmological
constant problem. </div>
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<div class="pub_date">June 2009</div>
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<p><i>The mathematical maps of theoretical physics — the Standard Model of particle physics and the Big Bang model of cosmology — have been highly successful in guiding our understanding of the Universe at the largest and smallest scales. Linking these two scales together is one of the golden goals of theoretical physics. But at the point where these maps merge, at the very edges of our
understanding of these fields, lies one of the most controversial concepts in physics: the cosmological constant.</i></p><p><a href="https://plus.maths.org/content/lambda-marks-spot-mdash-biggest-problem-theoretical-physics" target="_blank">read more</a></p>https://plus.maths.org/content/lambda-marks-spot-mdash-biggest-problem-theoretical-physics#comments5151aBig Bangcosmological constantcosmologydark energyFRW metricgeneral relativityparticle physicsstandard modelvacuum energyMon, 01 Jun 2009 21:30:00 +0000plusadmin2362 at https://plus.maths.org/content