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 the Butler Saw (mutoscope) this feature became widely used in Britain as a generic term for devices and movies of this kind. The phrase had entered British popular culture after the 1886 divorce case of Lord Colin Campbell and Gertrude Elizabeth Blood. The trial hinged on whether their butler could have seen Lady Campbell "in flagrante" with Captain Shaw of the Metropolitan Fire Brigade, through the keyhole of their dining room at 79 Cadogan Place, London. What the Butler Saw (mutoscope) What the Butler Saw was a mutoscope reel, and an early example of erotic films dating from the early 1900s. It depicted a