Identifier: officialproceedi04rail (find matches)
Title: Official proceedings
Year: 1901 (1900s)
Authors: Railway Club of Pittsburgh
Subjects: Railway Club of Pittsburgh Railroads
Publisher: Pittsburgh, Pa. : The Club
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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t give out its light and heat like what wenow call the helium stars, because they are many times hot-ter than our own sun, having been in all probability the firstcompleted suns as developed from the nebula.. Then there areother suns very much hotter than our own sun, called the Siriansuns or stars. In all probability the star Sirius is twenty-fivetimes brighter than our own sun and very many times hotter.Our sun has a temperature of something like the star Arcturusand other stars of a similar type. We may get some conceptionof the tremendous heat given out by our own sun when I tellyou that it would warm up 2,200,000,000 of worlds like our own,and if you built a column of ice reaching from the earth to the Building of a Universe. 233 moon and 15 miles in diameter and concentrate the heat of thesun upon it, it would be melted and dissipated into vapor in lessthan a second. And if we shoveled all the coal in the coal fieldsof Pennsylvania into the sun it would keep up its heat as it is
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SPECTRO HELIOGRAPH OF THE GREAT SUN SPOT OF OCTOBER, 1903.Taken by Dr. Oeo. E. Hale, Yerkes Observatory. giving it out now only one one-thousandth of a second. At onetime it was thought that the great mass of meteors supposed tofall into the sun continuously would keep up its temperature. 234 Proceedings Railway Club of Pittsburgh. P>ut it is now known that this would be totally inadequate tokeep up the solar heat the rate it is giving it out at the presenttime. But a solution that is now entirely satisfactory has beengiven to us by several eminent astronomers and physicists andit is now almost certainly known that the suns heat comes fromits shrinkage upon itself. It would only require a shrinkage of300 feet a year to enable it to give out or radiate its heat intospace as it is now doing. There is no doubt that this tre-mendous energy is being dissipated into space, but it may bepicked up by other worlds as they go along iu their course throughthe universe, for it is known that we

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