Newtonian telescope Newtonian telescope The Newtonian telescope, also called the Newtonian reflector or just the Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton's first reflecting telescope was completed in 1668 and is the earliest known functional reflecting telescope. The Newtonian telescope's simple design makes it very popular with amateur telescope makers. Newton's idea for a reflecting telescope was not new. Galileo Galilei and Giovanni Francesco Sagredo had discussed using a mirror as the image forming objective soon after the invention of the
Emperor and Galilean Emperor and Galilean Emperor and Galilean (in ) is a play written by Henrik Ibsen. Although it is one of the writer's lesser known plays, on several occasions Henrik Ibsen called "Emperor and Galilean" his major work. "Emperor and Galilean" is written in two complementary parts with five acts in each part and is Ibsen's longest play. The play is about the Roman Emperor Julian the Apostate. The play covers the years 351–363. Julian was the last non-Christian ruler of the Roman Empire. It was his desire to bring the empire back to its ancient Roman values. Another crucial and