Word: existing
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Dates: during 1970-1979
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...past year many charter tour operators have been forced out of business by the new, deeply discounted fares. The charter flights (and later the Laker flights) are what forced the reductions. The CAB has refused to protect the public by insisting that all Super Saver-type fares must exist for a specified lifetime (such as a five-year minimum). Once the charters are gone, you will see the discounts disappear quickly, and the airlines will have the public right where they want it paying high fares without the option of the less expensive charter flights...
...surface, that seems to be a rather audacious claim. Even through the most powerful telescope, no one has seen?or ever will see?black holes. Thus, for the time being at least, these inkblots of space are mere mathematical figments. So far, they can be shown to exist only as solutions to the complex equations of general relativity?Einstein's theory of gravity?and very troubling
...Some 50 billion years from now, the galaxies will crush together to form the ultimate singularity?a single gigantic black hole?and the universe will cease to exist. Wheeler, for one, sees no escape from what he calls "this final crunch." Says...
...death of giant stars. In what astronomers call catastrophic gravitational collapse, most of the matter contained in such a dying star begins falling in toward the stellar center. If the conditions are right, the matter crushes together with such enormous force that it literally compresses itself out of existence. The star becomes what mathematicians call a "singularity." Its matter is squeezed into an infinitesimally small volume, and it simultaneously becomes infinitely dense and has an infinitely high gravitational force. At the point of singularity, time and space no longer exist. "Imagine," says Harvard Astrophysicist Jonathan Grindlay, "you take an enormous...
Black holes apparently come in both economy and giant sizes. The gifted British theoretical physicist Stephen Hawking has shown mathematically that tiny black holes, dating back to the very origins of the universe, could exist. In the Big Bang, the primordial explosion that created the universe some 15 billion to 20 billion years ago, matter was hurled in all directions. In some places, Hawking says, quantities of matter roughly equivalent to the amount in a mountain may have become compressed enough to collapse, forming what he calls mini-black holes. Their circumference, as measured by their event horizons, could...