"Shibukawa Shunkai’s letters: A life dedicated to the Jokyo calendar", a newsletter article on the work of Shibukawa Shunkai (b. 1639) - first official astronomer of the Tokugawa Shogunate, Japan @NDLJP_en https://t.co/uFhFr4kUHw https://t.co/205mgVdq1Y
Japanese picture calendar "2nd year of Kyowa (1802) Tayama-reki"; made by picturing the daily needs of life in a mountain village and stamping a wooden type on each one; the first page featured the image of a dog, which meant it was the year of dog @NDLJP https://t.co/xQIyQM0eGg https://t.co/T7vB4PsRwc
(At right) View from the Asakusa Astronomical Observatory, used by the Tenmongata of the Edo shogunate for astronomical observation; at center is a "Kontengi" (armillary sphere); woodblock print by Katsushika Hokusai in "Fugaku-hyakkei" (1834/5) @NDLJP_en https://t.co/Ctw5MYrwLR https://t.co/QU1KoHq5hs
Folios from "Heitengi", a quick-reference chart for the paths of the sun, moon, & stars; by Iwahashi Yoshitaka, 1801 https://t.co/XHpat2Z5z5 https://t.co/fw9CA4i2A6
Astronomical diagrams from 太陽暦圖解 (The Sun is diagrammed??) (Tokyo, 19thC); National Diet Library Digital Collections https://t.co/wMIPiXPAb0 https://t.co/zIPVcYtPlt