september 23: what happened to that day

French King Louis XVI in 1784 issued a decree that all handkerchiefs were square, as sewing their oval shape is unprofitable.

In 1846, the German astronomer Johann Gottfried Halle of the Berlin Observatory, guided by the instructions of the French mathematician Urbain Le Verrier, discovered Neptune.

On this day, but in 1928, on the day of the autumn equinox, the construction of the Moscow Planetarium began.

In 1939, a time capsule was laid at the World's Fair in New York City, which was to be opened in 6939. The capsule contained a woman's hat, a man's smoking pipe and 1,100 microfilms.

On September 23, the French physicist who first measured the speed of light Armand Hippolyte Louis Fizeau (1819); German engineer, inventor, founder of the Bosch firm Robert Bosch (1861); English teacher, doctor, public figure, Nobel Peace Prize laureate (1949) John Boyd Orr (1880); Soviet and Russian missile designer, Hero of Socialist Labor Igor Seleznev (1931).