The Transit of Venus By George Forbes
The Transit of Venus By George Forbes
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In our eReader you can find the full English version of the book. Read The Transit of Venus By George Forbes Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Transit of Venus By George Forbes
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Hence the application of this method was not success- ful, and results of that transit were unsatisfactory.
Not daunted by the comparative failure of that attempt, the astronomers of last century made vigorous efforts to make the transit of 1/69 successful. The transit of 1761 was utilised in so far as it pointed out the difficulties in this kind of observation and gave them an approximate value of the sun's parallax to help them in choosing the most advantageous stations from which to observe ...the next transit.
Halley had no conception, when he proposed this kind of observation, of the difficulties attending it. The difficulty chiefly consists in determining accurately 42 THE TRANSIT OF VENUS. [CHAP.
the exact instant when the contact seems to take place. The values which have been deduced from the observations of last century, and especially of the year 1761, have varied considerably according to the mode of reducing the observations. Thus in 1761, Lalande found, from the observations of Pingre, 9"^ for the solar parallax, while Maskelyne found from the work of Mason and Dixon 8"6 ; Short >2 made it 8*"65 ; Wargentin, 8"'i to S"'3.
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You can find similar books in the "Read Also" column, or choose other free books by Forbes George to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Hence the application of this method was not success- ful, and results of that transit were unsatisfactory.
Not daunted by the comparative failure of that attempt, the astronomers of last century made vigorous efforts to make the transit of 1/69 successful. The transit of 1761 was utilised in so far as it pointed out the difficulties in this kind of observation and gave them an approximate value of the sun's parallax to help them in choosing the most advantageous stations from which to observe ...the next transit.
Halley had no conception, when he proposed this kind of observation, of the difficulties attending it. The difficulty chiefly consists in determining accurately 42 THE TRANSIT OF VENUS. [CHAP.
the exact instant when the contact seems to take place. The values which have been deduced from the observations of last century, and especially of the year 1761, have varied considerably according to the mode of reducing the observations. Thus in 1761, Lalande found, from the observations of Pingre, 9"^ for the solar parallax, while Maskelyne found from the work of Mason and Dixon 8"6 ; Short >2 made it 8*"65 ; Wargentin, 8"'i to S"'3.
What to read after The Transit of Venus By George Forbes?
You can find similar books in the "Read Also" column, or choose other free books by Forbes George to read onlineMoreLess
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