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
Jose the Galilean sins, there is drought in Israel, and such a one as Jose the Galilean prays for rain, the rain cometh straightway" (Yer. Ber. 9b). The popular invocation, "O Jose ha-Gelili, heal me!" survived even to the 10th century. This invocation is condemned by the Karaite Sahal ben Matzliah Jose the Galilean Jose the Galilean (, Rabbi Yose HaGelili), d. 15 Av, was a Jewish sage who lived in the 1st and 2nd centuries CE. He was one of the Tannaim, the rabbis whose work was compiled in the Mishna. Jose was a contemporary and colleague of Rabbis Akiva, Tarfon, and