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
Vila do Conde than 20 metres) disappear north of the Ave River. Yet, these deposits are irregular, and most comparable sediments are not necessarily found at the same altitude. There are also deformations associated with the last inter-glacial period, that have affected these sedimentary layers, most commonly in the beach of Sampaio, where deposits have been discovered between various altitudes (5 and 9 metres). The municipality is subdivided into the following local government civil parishes, of which Azurara, Árvore and Vila do Conde form the urbanized city of Vila do Conde: Vila do Conde is twinned with: The municipal authorities have promoted a