Martin Rees

Martin Rees

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Adı:
Martin Rees
Tam adı:
Martin John Rees
Unvan:
Kozmolog
Doğum:
York, Birleşik Krallık, 23 Haziran 1942
Martin John Rees, Britanyalı kozmolog ve astrofizikçi. 2004'ten beri Trinity Koleji'nin en üst idari sorumlusu, 2005-2010 arasında Kraliyet Topluluğu'nun başkanlığını yapmış bilim adamı.
The most incomprehensible thing about the universe is that it is comprehensible' is one of Einstein's best-known aphorisms, expressing his amazement that the laws of physics, which our minds are somehow attuned to understand, apply not just here on Earth but also in the remotest galaxy.
These six numbers constitute a 'recipe' for a universe. Moreover, the outcome is sensitive to their values: if any one of them were to be 'untuned', there would be no stars and no life. Is this tuning just a brute fact, a coincidence? Or is it the providence of a benign Creator? I take the view that it is neither. An infinity of other universes may well exist where the numbers are different. Most would be stillborn or sterile. We could only have emerged (and therefore we naturally now find ourselves) in a universe with the 'right' combination. This realization offers a radically new perspective on our universe, on our place in it, and on the nature of physical laws.

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Creatures like us require special conditions to have evolved, so our perspective is bound to be in some sense atypical. The vastness of our universe shouldn't surprise us, even though we may still seek a deeper explanation for its distinctive features.
Our universe, extending immensely far beyond our present horizon, may itself be just one member of a possibly infinite ensemble. This 'multiverse' concept, though speculative, is a natural extension of current cosmological theories, which gain credence because they account for things that we do observe.


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The cosmos is so vast because there is one crucially important huge number N in nature, equal to 1,000,000, 000,000,000,000,000,000,000,000,000,000. This number measures the strength of the electrical forces that hold atoms together, divided by the force of gravity between them. If W had a few less zeros, only a short-lived miniature universe could exist: no creatures could grow larger than insects, and there would be no time for biological evolution.
The cosmic number (omega) measures the amount of material in our universe - galaxies, diffuse gas, and 'dark matter'. tells us the relative importance of gravity and expansion energy in the universe. If this ratio were too high relative to a particular 'critical' value, the universe would have collapsed long ago; had it been too low, no galaxies or stars would have formed. The initial expansion speed seems to have been finely tuned.
Another number, E, whose value is 0.007, defines how firmly atomic nuclei bind together and how all the atoms on Earth were made. Its value controls the power from the Sun and, more sensitively, how stars transmute hydrogen into all the atoms of the periodic table. Carbon and oxygen are common, whereas gold and uranium are rare, because of what happens in the stars. If E were 0.006 or 0.008, we could not exist.
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Yazarın biyografisi

Adı:
Martin Rees
Tam adı:
Martin John Rees
Unvan:
Kozmolog
Doğum:
York, Birleşik Krallık, 23 Haziran 1942
Martin John Rees, Britanyalı kozmolog ve astrofizikçi. 2004'ten beri Trinity Koleji'nin en üst idari sorumlusu, 2005-2010 arasında Kraliyet Topluluğu'nun başkanlığını yapmış bilim adamı.

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