Frases de William Herschel

William Herschel Foto
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William Herschel

Fecha de nacimiento: 15. Noviembre 1738
Fecha de muerte: 25. Agosto 1822

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William Herschel, nacido Friedrich Wilhelm Herschel , fue un astrónomo y músico germano-británico, descubridor del planeta Urano y de otros numerosos objetos celestes, y padre del también astrónomo John Herschel.

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Frases William Herschel

„I have availed myself of the labors of preceding astronomers, but have been induced thereto by my own actual observation of the solar phenomena.“

—  William Herschel
Context: I should not wonder if, considering all this, we were induced to think that nothing remained to be added; and yet we are still very ignorant in regard to the internal construction of the sun.... The spots have been supposed to be solid bodies, the smoke of volcanoes, the scum floating on an ocean of fluid matter, clouds, opaque masses, and to be many other things.... The sun itself has been called a globe of fire, though, perhaps, metaphorically.... It is time now to profit by the observations we are in possession of. I have availed myself of the labors of preceding astronomers, but have been induced thereto by my own actual observation of the solar phenomena.<!-- p. 145-146 Ch.4 "Life and Works" quote from his paper "Nature and Construction of the Sun and Fixed Stars" (1795).

„Nebulæ can be selected so that an insensible gradation shall take place“

—  William Herschel
Context: Nebulæ can be selected so that an insensible gradation shall take place from a coarse cluster like the Pleiades down to a milky nebulosity like that in Orion, every intermediate step being represented. This tends to confirm the hypothesis that all are composed of stars more or less remote. Ch.4 "Life and Works"

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„A knowledge of the construction of the heavens has always been the ultimate object of my observations“

—  William Herschel
Context: A knowledge of the construction of the heavens has always been the ultimate object of my observations...<!-- p. 269

„It is evident that we cannot mean to affirm that the stars of the fifth, sixth, and seventh magnitudes are really smaller than those of the first, second, or third, and that we must ascribe the cause of the difference in the apparent magnitudes of the stars to a difference in their relative distances from us.“

—  William Herschel
Context: It is evident that we cannot mean to affirm that the stars of the fifth, sixth, and seventh magnitudes are really smaller than those of the first, second, or third, and that we must ascribe the cause of the difference in the apparent magnitudes of the stars to a difference in their relative distances from us. On account of the great number of stars in each class, we must also allow that the stars of each succeeding magnitude, beginning with the first, are, one with another, further from us than those of the magnitude immediately preceding. Ch.4 "Life and Works" from a memoir, published (1817).

„It will be necessary to explain the spirit of the method of arranging the observed astronomical objects under consideration in such a manner, that one shall assist us to understand the nature and construction of the other.“

—  William Herschel
Context: It will be necessary to explain the spirit of the method of arranging the observed astronomical objects under consideration in such a manner, that one shall assist us to understand the nature and construction of the other. This end I propose to obtain by assorting them into as many classes as will be required to produce the most gradual affinity... and it will be found that those contained in one article, are so closely allied to those in the next, that there is perhaps not so much difference between them... as there would be in an annual description of the human figure were it given from the birth of a child till he comes to be a man in his prime.<!-- p. 270-271

„This tends to confirm the hypothesis that all are composed of stars more or less remote.“

—  William Herschel
Context: Nebulæ can be selected so that an insensible gradation shall take place from a coarse cluster like the Pleiades down to a milky nebulosity like that in Orion, every intermediate step being represented. This tends to confirm the hypothesis that all are composed of stars more or less remote. Ch.4 "Life and Works"

„It is very probable that the great stratum called the Milky Way is that in which the sun is placed, though perhaps not in the very centre of its thickness.“

—  William Herschel
Context: It is very probable that the great stratum called the Milky Way is that in which the sun is placed, though perhaps not in the very centre of its thickness.... We gather this from the appearance of the Galaxy, which seems to encompass the whole heavens, as it certainly must do if the sun is within it.<!-- p. 159-160 Ch.4 "Life and Works".

„We may conceive that, perhaps in progress of time these nebulæ which are already in such a state of compression, may be still farther condensed so as actually to become stars.“

—  William Herschel
Context: We may conceive that, perhaps in progress of time these nebulæ which are already in such a state of compression, may be still farther condensed so as actually to become stars.<!-- p. 318

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„That the emission of light must waste the sun, is not a difficulty that can be opposed to our hypothesis.“

—  William Herschel
Context: That the emission of light must waste the sun, is not a difficulty that can be opposed to our hypothesis. Many of the operations of Nature are carried on in her great laboratory which we cannot comprehend. Perhaps the many telescopic comets may restore to the sun what is lost by the emission of light.<!-- p. 148 Ch.4 "Life and Works" quote from his paper "Nature and Construction of the Sun and Fixed Stars" (1795).

„In future... we shall look upon those regions into which we may now penetrate by means of such large telescopes, as a naturalist regards a rich extent of ground or chain of mountains containing strata variously inclined and directed, as well as consisting of very different materials. The surface of a globe or map therefore will but ill delineate the interior parts of the heavens.“

—  William Herschel
Context: In future... we shall look upon those regions into which we may now penetrate by means of such large telescopes, as a naturalist regards a rich extent of ground or chain of mountains containing strata variously inclined and directed, as well as consisting of very different materials. The surface of a globe or map therefore will but ill delineate the interior parts of the heavens.<!-- p. 157 Ch.4 "Life and Works" from a memoir (1784).

„The starlike appearance of the following six nebulæ is so considerable that the best description... was to compare them to stars with certain deficiencies.“

—  William Herschel
Context: The starlike appearance of the following six nebulæ is so considerable that the best description... was to compare them to stars with certain deficiencies.<!-- p. 328

„An object may not only contain stars, but also nebulosity not composed of them.“

—  William Herschel
Context: An object may not only contain stars, but also nebulosity not composed of them.<!-- p. 270

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„I have made it a rule never to employ a larger telescope when a smaller will answer the purpose.“

—  William Herschel
Context: I have made it a rule never to employ a larger telescope when a smaller will answer the purpose.<!-- p. 122 Ch.4 "Life and Works".

„According to my theory, a dark spot in the sun is a place in its atmosphere which happens to be free from luminous decompositions [above it].“

—  William Herschel
Ch.4 "Life and Works" quote from his paper "Nature and Construction of the Sun and Fixed Stars" (1795), p. 147

„The changes that are thus proved to have already happened, prepare us for those that may be expected hereafter to take place, by the gradual condensation of the nebulous matter“

—  William Herschel
Context: I compared also the present appearance of this nebula with the delineation which Huyghens has given of it in his Systema Saturnium... The changes that are thus proved to have already happened, prepare us for those that may be expected hereafter to take place, by the gradual condensation of the nebulous matter; for had we no where an instance of any alteration in the appearance of nebula, they might be looked upon as permanent celestial bodies, and the successive changes, to which by the action of an attracting principle they have been conceived to be subject, might be rejected as being unsupported by observation.<!-- p. 324

„Here is truly a hole in Heaven.“

—  William Herschel
as remembered by his sister Caroline, after a long period of scrutinizing a starless spot, probably in the constellation Scorpius. As quoted by

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