Henrietta Swan Leavitt they became an important part of the evidence that "spiral nebulae" are independent galaxies located far outside of our own Milky Way. Thus, Leavitt's discovery would forever change our picture of the universe, as it prompted Harlow Shapley to move our Sun from the center of the galaxy in the "Great Debate" and Edwin Hubble to move our galaxy from the center of the universe. Leavitt's discovery of a way to accurately measure distances on an inter-galactic scale, paved the way for modern astronomy's understanding of the structure and scale of the universe. The accomplishments of Edwin Hubble, the American
Twin Galaxies Twin Galaxies Twin Galaxies is an American organization that tracks video game world records and conducts a program of electronic-gaming promotions. It operates the Twin Galaxies website and publishes the "Twin Galaxies' Official Video Game & Pinball Book of World Records", with the Arcade Volume released on June 2, 2007. "The Guinness World Records - Gamers Edition 2008" was released in March, 2008 in conjunction with Twin Galaxies, who Guinness World Records considers to be the official supplier of verified world records to the annual volume. In mid-1981, Walter Day, founder of Twin Galaxies Incorporated, visited more than 100 video