…a European space probe which is part of the Cassini spacecraft, which detached from the orbiter and landed on Saturn’s moon Titan in 2005…
…(1629–95), Dutch physicist, mathematician, and astronomer. His wave theory of light enabled him to explain reflection and refraction. He also patented a pendulum clock, introduced the convergent eyepiece for telescopes, discovered a satellite of Saturn, and recognized the nature of Saturn’s rings, which had eluded Galileo…
…a simple eyepiece consisting of two separate planoconvex lenses, used chiefly in refracting telescopes of long focal length…
