sidereal year
Example Sentences
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The early Babylonians used a sidereal year, as will be shown shortly.
From The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture by Maunder, E. Walter (Edward Walter)
In order to ascertain when the earth has performed an entire revolution in its orbit, we must observe when the sun returns in conjunction with any fixed star; and this is called a sidereal year.
From Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained by Jones, Thomas P.
Their sidereal year was 4�m too long,7 and they kept the ecliptic stationary among the stars, making no allowance for the shifting of the equinoxes.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various
By comparing two successive years they could of course have got at a sidereal year; but this is what they did not do; hence the irregularity which produced the canicular cycle.
From Personal Recollections, from Early Life to Old Age, of Mary Somerville by Somerville, Mary
Thus the Babylonians had fixed the length of a tropical year within twenty-five seconds of the truth; their estimate of the sidereal year was barely two minutes in excess.
From History of the Conflict Between Religion and Science by Draper, John William