Books
As the earliest attempt to document the sky during the Warring States Period, Gan De's work possesses high scientific value. He wrote two books, the Treatise on Jupiter and the 8-volumes Treatise on Astronomical Astrology, both of which have been lost. Gan De also wrote the Astronomic star observation (天文星占, Tianwen xingzhan).
It can be seen on the quotations under Shiji (volume 27) and Hanshu (volume 26), but was preserved mostly in the Treatise on Astrology of the Kaiyuan Era.
In 1973, a similar catalogue by him and Shi Shen was uncovered in Mawangdui. It was arranged under the name of Divination of Five Planets. It records the motion of Jupiter, Saturn, Venus and other planets in their orbits between 246 BC and 177 BC.
Read more about this topic: Gan De
Famous quotes containing the word books:
“They lard their lean books with the fat of others’ works.”
—Robert Burton (1577–1640)
“All books are divisible into two classes: the books of the hour, and the books of all time.”
—John Ruskin (1819–1900)
“Having books published is very destructive to writing. It is even worse than making love too much. Because when you make love too much at least you get a damned clarte that is like no other light. A very clear and hollow light.”
—Ernest Hemingway (1899–1961)