Invoking The Voyagers Against Id |
Invoking The Voyagers Against Id |
Oct 24 2005, 03:04 PM
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Cornell President Rawlings Condemns Intelligent Design
Drawing from sources ranging from Cornell's founders to Voyager space missions, Interim President Hunter R. Rawlings III condemned the push to teach intelligent design in public schools Friday. The attack came during the president's State of... http://www.cornellsun.com/vnews/display.v/...4/435c7762cf891 "The desire to understand the world and the desire to reform it are the two great engines of progress." - Bertrand Russell -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Nov 18 2005, 03:00 AM
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
A neutron star, in some ways, may also be thought of as one huge atom! A neutron star which has lost mass through some mechanism would eventually pass the point at which the force of the nuclear degeneracy pressure exceeds that of the force of gravity and the star would then detonate with extreme violence.
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Guest_Richard Trigaux_* |
Nov 18 2005, 09:00 AM
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Guests |
QUOTE (deglr6328 @ Nov 18 2005, 03:00 AM) A neutron star, in some ways, may also be thought of as one huge atom! A neutron star which has lost mass through some mechanism would eventually pass the point at which the force of the nuclear degeneracy pressure exceeds that of the force of gravity and the star would then detonate with extreme violence. Yes it would, but if you think in depth, the energy of the detonatoin would have to be BROUGHT IN the neutron star by the mechanism able to break it (it will have to yeld a tremendous amount of energy to split apart the parts of the neutron star.) So this is, I think, rather unlikely to happen, and coalescence of two neutron stars or black holes may just yeld larger neutron stars/black holes. But eventually the process may produce jets (like in quasars) containing tiny fragment of neutronic matter. What is the smallest limit allowed for such a fragment to remaint bound by gravitation and avoid decaying/detonating? 0.1 solar mass? Earth mass? 1 kilog? 1 microgram? A hint that such lumps of neutronic matter could be small is that I heard it exist "nucleus" formed of... four neutrons. Of course in this case they are bound by the strong nuclear force, and anyway still unstable. The pressure of gravity must be strong enough to avoid the neutron to decay, and this may set the limit. Anyway a small lump of neutronic matter will be surrounded by a layer of ordinary matter, and look like a very small star of unusual properties, or like a white dwarf of higher density. If the lump can be very small, for instance 1m (about the mass of Earth) it may look like a star of some metres in diametre, but hot like a star! Another place where we could find giant atoms is the outer layer of a neutron star. Neutron stars still obey the common laws of physics, and chemical bodies get states according to their pressure and temperature. And a neutron star has an outer atmosphere of ordinary gas which pressure tends to zero when we get farther from the surface. Simply this layer is some millimetres thick, this is enough for the tremendous gravitation field to allow a very hight pressure and keep bodies solid. So, when we examine a neutron star from outside to inside, we may find, in a distance of some centimetres: 1) ordinary plasma 2) white dwarf-like degenerated solid matter, formed or iron nucleus and felectrons 3) perhaps a layer where pressure allows the existence of much larger nucleus than authorized in usual conditions. But this layer may be unstable and in this case we would have an abrupt transition to: 4) neutronic matter. |
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