Then, in 1610, on the occasion of his publication ... another Medici beneficiary. (Galileo's telescope and the rest of the collection have since returned to Florence.) Though capable of measuring ...

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

NASA When the spacecraft’s namesake, Galileo Galilei, first trained his telescope on Jupiter in 1610, he saw only four moons: Io, Europa, Ganymede, and Callisto (arranged in this artificial ...

Credit: Galileo Galilei, 1610 Within sixty years, Isaac Newton had built his own new and improved reflecting telescope with a curved mirror, coated with a fine layer of reflective silver metal ...