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
Galilean faith Galilean faith The Galilean faith (or "Galilaean faith") is a term used by some people of the ancient world (most notably emperor Julian) to designate Christianity. The town of Nazareth (the place of Jesus' childhood) is located in Galilee. Christ's followers were thus called "Galileans". Galilee was part of the province of Judea. The reason for this term was to marginalize Christianity and to indicate that it came from a small area, a religion of only local significance. In the same manner, Jesus was called "of Nazareth" or "the Nazarene" in this context (another emphasis on geographical origin and the