Category Archives: April 2012

Geometrical Optics and the Hastings-Byrne Refractor: Part II

John Church Last month I reviewed the “lens-maker’s formula” that allows one to calculate the focal length (the inverse of the “power”) of a thin lens, provided that one knows the refractive index of the glass and the radii of … Continue reading

Posted in April 2012 | Tagged , , , , | 1 Comment

Robotics Research Success at the ISS

Ken Kremer of Spaceflight magazine, Universe Today & AAAP From March 7 to 9, a combined team of American and Canadian engineers successfully performed groundbreaking robotics research aboard the ISS during first-of-its-kind joint operations between NASA’s new Robotic Refueling Mission … Continue reading

Posted in April 2012 | Tagged , , , | Leave a comment