A new challenge to classical cosmology comes from a novel field named loop quantum cosmology (LQC), which started from applying rules of loop quantum gravity on the context of general relativity. The new vision states that the universe we live in did not emerge from an infinitely small particle with a similarly infin... |
12 December 2008
05:30 GMT |
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In a recent article for the New Scientist publication, there is an interesting scientific explanation to the famous (albeit rather theological) question posed by Saint Thomas Aquinas (1225-1274), "Why is there something rather than nothing?". However, the answer does not involve God, but rather how the universe was b... |
28 November 2008
04:50 GMT |
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Approximately a decade ago astronomers discovered that not only is the universe expanding in space-time, but also that this expansion is accelerating. Since there was no explanation to why this is happening, they proposed the concept of dark energy, a form of energy that makes up about 75 percent of the mass of the u... |
24 May 2008
04:54 GMT |
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What better way to understand the universe than to create your very own? Of course, black holes, supernova explosions and Big Bangs are off limits for laboratories on Earth, but helium-3 cooled to only 17,7 degrees Celsius above absolute zero will do just as good in replicating the processes that took place soon afte... |
9 May 2008
04:18 GMT |
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A comparison between supernova explosions taking place today and those that occurred early in the life of the universe reveals that the latter appear to age slower, as if time was warped somehow. It may look as counterintuitive or even impossible to some of us, but in fact, this is confirmed by the inflation theory, ... |
29 April 2008
02:51 GMT |
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Geza Dyuk, the director of Astronomy at the Adler Planetarium, says that the universe is indeed expanding. Incredibly, even the great German physicist Albert Einstein didn't know for certain if the universe was expanding or contracting, at the time when he published his Theory of Relativity back in 1905. So, whi... |
19 January 2008
03:40 GMT |
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Even today, most of the scientific communities still believe that the universe might have originated in a Big Bang explosion, but have no way to prove such process ever took place. Furthermore, although singularity-like objects are allowed to exist in the fabric of space-time, models explaining how such structures c... |
15 January 2008
11:03 GMT |
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What is the dark matter? I don't know; in fact, nobody knows for certain what it is. However, we do know two basic facts: we proved that it does exist, and without it the galaxies would mostly fall apart. Nevertheless, it is extremely hard to create a complete image of the past and future of the universe, when y... |
12 January 2008
07:14 GMT |
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Current theories about the beginning of the universe predict that all the observed matter originated in a single point in space, a singularity, which suddenly expanded in space-time provoking the so-called Big Bang. The light emitted by the glowing matter in the beginning of the universe slowly shifted towards the in... |
27 December 2007
02:52 GMT |
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For years now, the Standard Model has been used by physicists as the main theory in studying the universe. After the electric and the magnetic mixed into the electromagnetic force, and after the release of Einstein's theory of relativity, scientists tried to unify the remaining forces - gravity, strong nuclear f... |
26 October 2007
06:05 GMT |
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