Title: Jan Oort
Content: He has been described as "putting the Netherlands in the forefront of postwar astronomy." Oort determined that the Milky Way rotates and overturned the idea that the Sun was at its center. He also postulated the existence of the mysterious invisible dark matter in 1932, which is believed to make up roughly 84.5% of the total matter in the Universe and whose gravitational pull causes "the clustering of stars into galaxies and galaxies into connecting strings of galaxies". He discovered the galactic halo, a group of stars orbiting the Milky Way but outside the main disk. Additionally Oort is responsible

Title: Henrietta Swan Leavitt
Content: 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

Title: Marijn Franx
Content: research on the formation and evolution of galaxies. Franx is the only Dutch scientist to work on the successor to the Hubble Space Telescope, the James Webb Space Telescope. In March 2016 it was announced that a team of researchers, including Franx, had discovered the farthest galaxy thus far, located at 13.4 billion lightyears. Marijn Franx Marijn Franx (born 20 July 1960) is a Dutch professor of Astronomy at Leiden University. He was a winner of the 2010 Spinoza Prize. His research focuses on the formation and evolution of galaxies. He is involved with both the Hubble and James Webb

Title: History of the center of the Universe
Content: on this, Curtis was able to estimate that Andromeda was 500,000 light-years away. As a result, Curtis became a proponent of the so-called "island Universes" hypothesis, which held that objects previously believed to be spiral nebulae within the Milky Way were actually independent galaxies. In 1920, the Great Debate between Harlow Shapley and Curtis took place, concerning the nature of the Milky Way, spiral nebulae, and the dimensions of the Universe. To support his claim that the Great Andromeda Nebula (M31) was an external galaxy, Curtis also noted the appearance of dark lanes resembling the dust clouds in our own

Title: Yorkshire and the Humber
Content: to overcome Einstein's 1917 cosmological constant of a static universe, and was only widely accepted after the 1930s. The clergyman John Michell, a vicar of Thornhill, was the first person to calculate a realistic distance of stars, observed in the night sky, from Earth. As early as the 18th century he was also the first to propose that light from the stars could be deflected by their own gravity, and has been described as the father of seismology and magnetometry. Kenneth Bentley of Reckitt & Colman at Hull in 1963 discovered his Bentley compounds (orvinols), which included etorphine, which for

Question: Who is credited with the discovery of galaxies outside of our own?
Answer: Edwin Hubble