March Meeting

Saturday, March 12, 7 p.m.
Avonport, 475 Bluff Road

Speaker: Roy Bishop

Roy Bishop and Larry Bogan founded MAG over 21 years ago, in November 1994. Roy has had a keen interest in astronomy since childhood, although he has never taken a course in the subject. His formal background is in physics.

Topic: A Matter of Some Gravity

One hundred years ago Albert Einstein presented his General Theory of Relativity (GTR), a description of gravitation that replaced Newton’s theory of 1687. The GTR is the foundation of modern cosmology, the study of the nature and structure of the Universe. Besides giving a revolutionary insight into the nature of gravity, and being essential for GPS navigation, the GTR predicts the existence of gravitational waves. Almost 40 years ago indirect evidence for gravitational waves was found in the orbital decay of a binary pulsar. About the same time, apparatus to possibly detect gravitational waves directly began to be built. These detectors have become increasingly more sensitive as designs and technology have advanced. Success occurred late last summer. After traveling for more than a billion years, on 2015 September 14 at 06:50:45 ADT a burst of gravitational waves passed through Earth. You did not feel them but two detectors in the USA did, opening a new branch of astronomy. That discovery was announced last month, on February 11. As the Canadian reporter Ivan Semeniuk put it: “After countless generations of living in silence on the shores of a vast and restless cosmic ocean, the human species can finally hear the surf.”

Comments are closed.

MAG Events
  • No events