Geocentric model explanation in terms of the Earth's revolution about the sun. In 1838, astronomer Friedrich Wilhelm Bessel measured the parallax of the star 61 Cygni successfully, and disproved Ptolemy's claim that parallax motion did not exist. This finally confirmed the assumptions made by Copernicus, providing accurate, dependable scientific observations, and conclusively displaying how distant stars are from Earth. A geocentric frame is useful for many everyday activities and most laboratory experiments, but is a less appropriate choice for solar system mechanics and space travel. While a heliocentric frame is most useful in those cases, galactic and extragalactic astronomy is easier if
What Would the Founders Do? What Would the Founders Do? What Would the Founders Do?: Our Questions, Their Answers is a 2006 non-fiction book by American journalist and historian Richard Brookhiser. The author discusses the viewpoints, backgrounds, and character traits of the American Founding Fathers and compares and contrasts them with the socio-political debates of present-day Americans. Brookhiser states, "We can be as intelligent as they were, and as serious, as practical, and as brave." The book was published by Basic Books. Some of the issues detailed include the death penalty, gun control, censorship, assisted suicide, preemptive war, Indian casinos, campaign finance reform, and term