Documents Telescopes

Telescopes Amateur and Professional Galileo 1609 The Moon as a World Jupiter has Moons Refracting telescopes Long focus refractors were awkward but suffered less from chromatic…

Documents Telescopes

Telescopes Amateur and Professional Galileo 1609 The Moon as a World Jupiter has Moons Refracting telescopes Long focus refractors were awkward but suffered less from chromatic…