by George L. Murphy
Einstein’s theory of relativity means, among other things, that a modified version of Tycho Brahe’s earth-centered model of the planetary system is, in principle, as good as Copernicus’ sun-centered model. The question of whether the earth or the sun “really” moves is meaningless in this theory. After dealing with challenges to this claim, . . . → Read More: Does the Earth Move?
by Ronald Larson
The effort to explain the “fine-tuning” of our universe by appealing to a “multiverse” of many universes from which our universe is selected for observation by our existence within it, is a double-edged sword. I argue that this line of “anthropic” reasoning implicitly depends on acknowledgment of “apparent design” in the universe, and in . . . → Read More: Design or the Multiverse?
by Joseph L. Spradley
The origin, size, and location of our Moon play a unique and essential role for the existence of life on Earth. Earth’s Moon is the largest moon in the solar system in relation to its host planet and appears to have formed in a unique way, compared to all other known moons, by . . . → Read More: Ten Lunar Legacies: Importance of the Moon for Life on Earth