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
Central Kwara'ae constituency Central Kwara'ae constituency Central Kwara'ae is a parliamentary constituency electing one representative to the National Parliament of Solomon Islands. It had a registered electorate of 8,977 in 2006, and 9,955 in 2010. It is one of fourteen constituencies in Malaita Province. The constituency was established for the Fifth Parliament in 1993, and its first MP was Alfred Maetia. Fred Fono won the seat in 1997, and was twice re-elected, ultimately becoming deputy Prime Minister in 2007. He stood for a fourth term in 2010, but was unseated by political newcomer and independent candidate Jackson Fiulaua, in what was described as