History of Astronomy |
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Page 138
... nebula , cooled down , and rushed through another part of the nebula , rendering the nebular gas more luminous than itself . I Since 1892 one Nova after another has shown a spectrum as described above , like a meteor rushing towards us ...
... nebula , cooled down , and rushed through another part of the nebula , rendering the nebular gas more luminous than itself . I Since 1892 one Nova after another has shown a spectrum as described above , like a meteor rushing towards us ...
Page 141
... Nebula and Star - clusters . — Our knowledge of nebulæ really dates from the time of W. Herschel . In his great sweeps of the heavens with his giant telescopes he opened in this direction a new branch of astronomy . At one time he held ...
... Nebula and Star - clusters . — Our knowledge of nebulæ really dates from the time of W. Herschel . In his great sweeps of the heavens with his giant telescopes he opened in this direction a new branch of astronomy . At one time he held ...
Page 142
... nebula after another was resolved into a cluster of minute stars . At that time the opinion gained ground that with increase of telescopic power this would prove to be the case with all nebulæ . In 1864 all doubt was dispelled by ...
... nebula after another was resolved into a cluster of minute stars . At that time the opinion gained ground that with increase of telescopic power this would prove to be the case with all nebulæ . In 1864 all doubt was dispelled by ...
Page 143
... nebulæ is remarkably actinic , so that photography has a specially fine field in revealing details imperceptible in the telescope . In 1885 the brothers Henry photographed , round the star Maia in the Pleiades , a spiral nebula 3 ' long ...
... nebulæ is remarkably actinic , so that photography has a specially fine field in revealing details imperceptible in the telescope . In 1885 the brothers Henry photographed , round the star Maia in the Pleiades , a spiral nebula 3 ' long ...
Page 145
... nebula , and is condensed and heated by condensation until it begins to shine as a star ; that it attains a climax of tempera- ture , then cools down , and eventually becomes extinct . They go so far as to declare that they know what ...
... nebula , and is condensed and heated by condensation until it begins to shine as a star ; that it attains a climax of tempera- ture , then cools down , and eventually becomes extinct . They go so far as to declare that they know what ...
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accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS