“My Instrument being fixed, I immediately began to observe such Stars as I judged most proper to give me light into the Cause of the Motion… There was Variety enough of small ones; and not less than twelve, that I could observe through all the Seasons of the Year; they being bright enough to be seen in the Day-time, when nearest the Sun. I had not been long observing, before I perceived, that the Notion we had before entertained of the Stars being farthest North and South, when the Sun was about the Equinoxes, was only true of those that were near the solstitial Colure: And after I had continued my Observations a few Months, I discovered what I then apprehended to be a general Law, observed by all the Stars, viz.”

— James Bradley

That each of them became stationary, or was farthest North or South, when they passed over my Zenith at six of the Clock, either in the Morning or Evening. I perceived likewise, that whatever Situation the Stars were in with respect to the cardinal Points of the Ecliptick, the apparent Motion of every one tended the same Way, when they passed my Instrument about the same Hour of the Day or Night; for they all moved Southward, while they passed in the Day, and Northward in the Night; so that each was farthest North, when it came about Six of the Clock in the Evening, and farthest South when it came about Six in the Morning.
A Letter from the Reverend Mr. James Bradley Savilian Proffesor of Astronomy at Oxford, and F.R.S. to Dr. Edmund Halley, Astronom. Reg. &c. giving an Account of a New Discovered Motion of the Fix'd Stars. Philosophical Transactions (Jan 1, 1727) 1727-1728 No. 406. vol. XXXV. pp. 637-661 http://rstl.royalsocietypublishing.org/content/35/399-406/637.full.pdf+html.

Adopted from Wikiquote. Last update June 3, 2021. History

Help us to complete the source, original and additional information

Do you have more details about the quote "My Instrument being fixed, I immediately began to observe such Stars as I judged most proper to give me light into the …" by James Bradley?

James Bradley 11

English astronomer; Astronomer Royal 1693–1762

Related quotes

“My Instrument being fixed, I immediately began to observe such Stars as I judged most proper to give me light into the Cause of the Motion… There was Variety enough of small ones; and not less than twelve, that I could observe through all the Seasons of the Year; they being bright enough to be seen in the Day-time, when nearest the Sun. I had not been long observing, before I perceived, that the Notion we had before entertained of the Stars being farthest North and South, when the Sun was about the Equinoxes, was only true of those that were near the solstitial Colure: And after I had continued my Observations a few Months, I discovered what I then apprehended to be a general Law, observed by all the Stars, viz. That each of them became stationary, or was farthest North or South, when they passed over my Zenith at six of the Clock, either in the Morning or Evening. I perceived likewise, that whatever Situation the Stars were in with respect to the cardinal Points of the Ecliptick, the apparent Motion of every one tended the same Way, when they passed my Instrument about the same Hour of the Day or Night; for they all moved Southward, while they passed in the Day, and Northward in the Night; so that each was farthest North, when it came about Six of the Clock in the Evening, and farthest South when it came about Six in the Morning.”

James Bradley (1693–1762) English astronomer; Astronomer Royal

A Letter from the Reverend Mr. James Bradley Savilian Proffesor of Astronomy at Oxford, and F.R.S. to Dr. Edmund Halley, Astronom. Reg. &c. giving an Account of a New Discovered Motion of the Fix'd Stars. Philosophical Transactions (Jan 1, 1727) 1727-1728 No. 406. vol. XXXV. pp. 637-661 http://rstl.royalsocietypublishing.org/content/35/399-406/637.full.pdf+html, pp.643-644

“I used to always think I had to have a reason to record my observations of the day, or even my emotions, but now I think simply being alive is more than enough reason.”

Douglas Coupland Microserfs

Microserfs (1995)

“Sir,
Having long deferred to make any report relating to the observations that were taken at sea by captain Campbell, in the year 1757, which you transmitted to me by order of the lords of the admiralty, I think it necessary to acquaint you, that, upon examining those observations, I perceived that they were not in all respects accompanied with such circumstances as are requisite for forming a right judgment of the accuracy and certainty with which observations proper for finding the longitude at sea by the moon can in fact be taken; for which reason I delayed giving my opinion upon this point till I could have an opportunity of comparing a greater variety of observations, made at different times, and with different instruments: such an opportunity having lately been given me by captain Campbell, who has favoured me with a copy of several observations that were made by him in 1758 and 1759, I now beg leave to lay before their lordships the result of the comparisons which I have made.”

James Bradley (1693–1762) English astronomer; Astronomer Royal

Miscellaneous Works and Correspondence (1832), To Mr. Cleveland Secretary of the Admiralty (April 14, 1760)

“When the year was completed, I began to examine and compare my observations, and having pretty well satisfied myself as to the general laws of the phenomena, I then endeavored to find out the cause of them. I was already convinced that the apparent motion of the stars was not owing to the nutation of the earth's axis. The next thing that offered itself was an alteration in the direction of the plumb-line with which the instrument was constantly rectified; but this upon trial proved insufficient. Then I considered what refraction might do, but here also nothing satisfactory occurred. At length I conjectured that all the phenomena hitherto mentioned, proceeded from the progressive motion of light and the earth's annual motion in its orbit. For I perceived that, if light was propagated in time, the apparent place of a fixed object would not be the same when the eye is at rest, as when it is moving in any other direction than that of the line passing through the eye and the object; and that, when the eye is moving in different directions, the apparent place of the object would be different.”

James Bradley (1693–1762) English astronomer; Astronomer Royal

As quoted by W. S. Eichelberger, "The Distances of the Heavenly Bodies," http://www.jstor.org/stable/1639343 Science New Series, Vol. 43, No. 1110 (Apr. 7, 1916), pp. 475-483.

“But before I proceed farther it may be proper to take notice, that since the time when I gave their lordships an account of the near agreement of Mr. Professor Mayer's lunar tables with the observations that had been then made at the Royal Observatory, I have compared several others, which concurred to prove that the difference between the observed and computed places nowhere amounted to more than about one minute and a half; and I find that the difference (small as it is) may yet be diminished by making alterations in some of the equations, whose true quantity could not be determined without proper observations; after making the needful corrections it appeared, by the comparison of above eleven hundred observations taken here since the new instruments were fixed up, that the difference did nowhere amount to more than a minute: it may therefore be reasonably concluded, that so far as it will depend upon the lunar tables the true longitude of a ship at sea may in all cases be found within about half a degree, and generally much nearer.”

James Bradley (1693–1762) English astronomer; Astronomer Royal

Miscellaneous Works and Correspondence (1832), To Mr. Cleveland Secretary of the Admiralty (April 14, 1760)

“My entire delight was in observing without being myself noticed,— if I could have been invisible, all the better.”

John Ruskin (1819–1900) English writer and art critic

Praeterita, volume I, chapter IX (1885-1889).
Context: My entire delight was in observing without being myself noticed,— if I could have been invisible, all the better. I was absolutely interested in men and their ways, as I was interested in marmots and chamois, in tomtits and trout. If only they would stay still and let me look at them, and not get into their holes and up their heights! The living inhabitation of the world — the grazing and nesting in it, — the spiritual power of the air, the rocks, the waters, to be in the midst of it, and rejoice and wonder at it, and help it if I could, — happier if it needed no help of mine, — this was the essential love of Nature in me, this the root of all that I have usefully become, and the light of all that I have rightly learned.

“Here [in Slough], soon after my arrival, I began to lay the foundation upon which by degrees the whole structure was raised as it now stands, and the speculum being highly polished and put into the tube, I had the first view through it on February 19, 1787. …the first speculum, by a mismanagement of the person who cast it, came out thinner on the centre of the back than was intended, and on account of its weakness would not permit a good figure to be given to it. …A second mirror was cast January 26, 1788, but it cracked in cooling. February 16 we recast it, and it proved to be of a proper degree of strength. October 24 it was brought to a pretty good figure and polish, and I observed the planet Saturn with it. But not being satisfied, I continued to work upon it till August 27, 1789, when it was tried upon the fixed stars, and I found it to give a pretty sharp image. Large stars were a little affected with scattered light, owing to many remaining scratches on the mirror. August the 28th, 1789, having brought the telescope to the parallel of Saturn, I discovered a sixth satellite of that planet, and also saw the spots upon Saturn better than I had ever seen them before, so that I may date the finishing of the forty-foot telescope from that time.”

William Herschel (1738–1822) German-born British astronomer, technical expert, and composer

Source: Sir William Herschel: His Life and Works (1880), Ch.4 "Life and Works".

“I caught a glimpse of sun rays filtering through a window, thus lighting up a portion of this magnificent building. I was racing against the sun, desperately trying to finish my sketch before the light disappeared. I knew I had only an hour and a half before sunset.”

Wahbi Al-Hariri (1914–1994) Artist, architect, author

Source: Lisa Kaaki (2002-01-25). Wahbi Al-Hariri - the last of the classicists http://www.webcitation.org/6HcrXOzJ5. Arab News. Saudi Research & Publishing Company.

“(Songwriting) It's a gift. It all comes from somewhere. I started out really young, when I was four, five, six, writing poems, before I could play an instrument. I was writing about things when I was eight or 10 years old that I hadn't lived long enough to experience.”

Willie Nelson (1933) American country music singer-songwriter.

Source: Willie Nelson: 'If We Made Marijuana Legal, We'd Save a Whole Lotta Money and Lives', Michael, Hann, May 17, 2012, May 20, 2012, The Guardian, Guardian News and Media Ltd. http://www.guardian.co.uk/music/2012/may/17/30-minutes-with-willie-nelson,

“I was reading the Book of Job. / People I knew came and went, / I read their book, / the seasons turned away, / I had been reading for a long time. / I was quiet. Not a single leaf to be seen. / I looked up: it had gone dark on me, / that star / in the middle of the sentence: // Where wast thou when I laid the foundations of the earth?”

Mirkka Rekola (1931–2014) Finnish writer

Help us to complete the source, original and additional information

James Bradley 11

Related quotes

Related topics