A recent news article announced the discovery of 300,000 new galaxies bringing the number to somewhere around 100 billion some 12 to 18 billion light years away. Such numbers boggle the mind as does the notion that we can actually calculate such distances. Yet starting back in about 240 BC in Alexandria, Egypt Eratosthenes managed to calculate with amazing accuracy the circumference of the earth. Once that was done, it was only a matter of time before people calculated the distance to the Moon, to the Sun, and finally to the stars.
How did they do it? Dr. Scott Olsson has been discussing these matters with our Wyoming Catholic College sophomores. Dr. Olsson is our guest on this edition of The After Dinner Scholar.