The 1807 slave act
abolished slavery in 28 america
abolished the british slave trade
abolished slavery in brazil
abolished slavery in the british colonies

to demand women’s suffrage

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.