News tagged with theory of relativity

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Probing gravity

(Phys.org) -- Einstein's theory of relativity is remarkable not only because it is so successful in explaining seemingly bizarre observations (like the bending of starlight) or because it has assembled a coherent picture ...

dateJul 30, 2012 in Astronomy
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When dark energy turned on (Update)

(PhysOrg.com) -- Some six billion light years distant, almost halfway from now back to the big bang, the universe was undergoing an elemental change. Held back until then by the mutual gravitational attraction of all the ...

dateMar 30, 2012 in Astronomy
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Quantum copies do new tricks

One of the strange features of quantum information is that, unlike almost every other type of information, it cannot be perfectly copied. For example, it is impossible to take a single photon and make a number of photons ...

dateMar 22, 2012 in Quantum Physics
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The annihilating effects of space travel

Long distance space travel could create the ultimate 'killer entrance', devastating your destination and anything around the arriving spacecraft, according to calculations by Professor Geraint Lewis and two honours students ...

dateMar 12, 2012 in General Physics
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