The Elements of Astronomy: Designed for the Use of Students in the University (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from The Elements of Astronomy: Designed for the Use of Students in the University

The method used by astronomers tolndeté'r mine the obliquity of the'ecliptic, is thatfiexplgmggl'm Art. 86, by taking half 'the difference of 'the greatest and least meridian altitudes of thefsun'. Thefollowl ing is the obliquity, as determined byftlie' different astronomers.

Er'alosthenes 230 years before J. C. 20 Hipparchus 140 years before J. C. 20.

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