The Transit of Venus, Its Meaning and UseLongmans&Company, 1875 - 20 pages |
From inside the book
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Page 12
... enabled to measure the exact length of each of his two meeting lines . To make this explanation more apparent , the reader can compare it with diagram No. 2 , where let A B be the base line , C D the river , and E the inaccessible ...
... enabled to measure the exact length of each of his two meeting lines . To make this explanation more apparent , the reader can compare it with diagram No. 2 , where let A B be the base line , C D the river , and E the inaccessible ...
Page 13
... enable us to effect our object easily . Now the only base line that we can make use of on the Earth for the purpose of establish- ing an angle such as that obtained by the use of the theodolite is confined within the limits of the Earth ...
... enable us to effect our object easily . Now the only base line that we can make use of on the Earth for the purpose of establish- ing an angle such as that obtained by the use of the theodolite is confined within the limits of the Earth ...
Page 15
... enable us to measure the width of this band , and for this purpose we will assume the base line to be 7,000 miles long . Now if Venus were exactly half way between the Earth and the Sun , the width of the band would be exactly the same ...
... enable us to measure the width of this band , and for this purpose we will assume the base line to be 7,000 miles long . Now if Venus were exactly half way between the Earth and the Sun , the width of the band would be exactly the same ...
Other editions - View all
The Transit of Venus: Its Meaning and Use (Classic Reprint) Thomas Hayward Budd No preview available - 2016 |
The Transit of Venus: Its Meaning and Use (Classic Reprint) Thomas Hayward Budd No preview available - 2018 |
Common terms and phrases
able accuracy actual height angles apparent height ascer ascertain the distance astronomers band base line breadth centre circle parallel circular circumference clearly the Sun comparing course cross the Sun degrees DIAGRAM difference in length distance of Venus divided into 360 Earth than half Earth's orbit eclipse enable exact length exactly explain face fact nearly fixed fore happens horizontally inaccessible object inference less line drawn looks marked means measure meeting lines miles in diameter miles wide Moon MUSEUM nearer the Earth North point noted observer saw obvious occurred orbit of Venus particular positions passing pivot planet to cross pole possibly be equal precisely proportion purpose readers river round the Sun saw it cross scale seen simple South stations Sun's disc supposed tain tape theodolite touch the top transit of Venus tree turn his telescope twentieth width words yards