1971 newspaper EXISTANCE OF BLACK HOLES in THE UNIVERSE 1st PROVEN by ASTRONOMY for Sale

1971 newspaper EXISTANCE OF BLACK HOLES in THE UNIVERSE 1st PROVEN by ASTRONOMY For Sale

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1971 newspaper EXISTANCE OF BLACK HOLES in THE UNIVERSE 1st PROVEN by ASTRONOMY:
$30.00

1971 newspaper EXISTANCE OF BLACK HOLES in THE UNIVERSE 1st PROVEN by ASTRONOMY

1971 newspaper with an inside-page headline and early report announcing theexistence OF BLACK HOLES in the UNIVERSEand detailing the threat they pose to our Milky Way galaxy - inv # 7Y-311

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SEE PHOTO(s) - COMPLETE ORIGINALNEWSPAPER,theYork Dispatch(York, PA)datedOctober 6, 1971 with compelling Astronomical discoeryhistory!

A black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizon. Although it has a great effect on the fate and circumstances of an object crossing it, it has no locally detectable features according to general relativity. In many ways, a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly.

Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace. In 1916, Karl Schwarzschild found the first modern solution of general relativity that would characterize a black hole. David Finkelstein, in 1958, first published the interpretation of \"black hole\" as a region of space from which nothing can escape. Black holes were long considered a mathematical curiosity; it was not until the 1960s that theoretical work showed they were a generic prediction of general relativity. The discovery of neutron stars by Jocelyn Bell Burnell in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality. The first black hole known was Cygnus X-1, identified by several researchers independently in 1971.

Black holes of stellar mass form when massive stars collapse at the end of their life cycle. After a black hole has formed, it can grow by absorbing mass from its surroundings. Supermassive black holes of millions of solar masses (M?) may form by absorbing other stars and merging with other black holes. There is consensus that supermassive black holes exist in the centres of most galaxies.

The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Any matter that falls onto a black hole can form an external accretion disk heated by friction, forming quasars, some of the brightest objects in the universe. Stars passing too close to a supermassive black hole can be shredded into streamers that shine very brightly before being \"swallowed.\" If other stars are orbiting a black hole, their orbits can be used to determine the black hole\'s mass and location. Such observations can be used to exclude possible alternatives such as neutron stars. In this way, astronomers have identified numerous stellar black hole candidates in binary systems and established that the radio source known as Sagittarius A*, at the core of the Milky Way galaxy, contains a supermassive black hole of about 4.3 million solar masses.acts” warranting a military response.

Very good condition. This listing includes thecomplete entire original newspaper, NOT just a clipping or a page of it. STEPHEN A. GOLDMAN HISTORICAL NEWSPAPERS stands behind all of the items that we sell with a no questions asked, money back guarantee. Every item we sell is an original newspaper printed on the date indicated at the beginning of its description. U.S. buyers paypriority mail postage which includes waterproof plastic and a heavy cardboard flat to protect the purchased itemfrom damage in the mail. Uponrequest by the buyer, we can ship by USPS Media Mail to reduce postage cost; however, please be aware that USPS Media Mailcanbe very slow in its time of transit to the buyer.International postage is quoted when we are informed as to where the package is to be sent. We do combine postage (to reduce postage costs) for multiple purchases sent in the same package. We list thousands of rare newspapers with dates from 1570 through 2004 on each week. This is truly SIX CENTURIES OF HISTORY that YOU CAN OWN!

Stephen A. Goldman Historical Newspapers has been in the business of buying and selling historical newspapers for over 50 years. Dr. Goldman is a consultant to the Freedom Forum Newseum and a member of the American Antiquarian Society. You can buy with confidence from us, knowing that we stand behind all of our historical items with a 100% money back guarantee. Let our 50+ years of experience work for YOU ! We have hundreds of thousands of historical newspapers (and their very early precursors) for sale.

Stephen A. Goldman Historical Newspapershas been in the business of buying and selling historical newspapers for over 50 years. We are located in the charming Maryland Eastern Shore town of OXFORD, Maryland.

Dr. Goldman is a consultant to the Freedom Forum Newseum and a member of the American Antiquarian Society. You can buy with confidence from us, knowing that we stand behind all of our historical items with a 100% money back guarantee. Let our 50+ years of experience work for YOU ! We have hundreds of thousands of historical newspapers (and their very early precursors) for sale.

We invite customer requestsforhistorical newspapers that are not yetlocated in our extensive listing ofitems. With an inventory of nearlya million historical newspapers (and their early precursors) we arelikely have just the one YOU are searching for.

WE ARE ALSO ACTIVE BUYERS OF HISTORICAL NEWSPAPERS, including large and small personal collections, bound volumes, significant individual issues, or deaccessions from libraries and historical societies. IF YOU WANT TO SELL, WE WANT TO BUY !!!