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Phenomena Encyclopedia Entry 1780384984

The Great Attractor is a region of space that is pulling our galaxy, the Milky Way, and many others towards it, located approximately 250 million light-years away in the direction of the constellation Centaurus. ## Overview The Great Attractor is a region of space that has been observed to be exerting a gravitational pull on our galaxy, the Milky Way, and many others. This phenomenon was first discovered in the 1970s by a team of astronomers led by Brent Tully and Richard Fisher, who were studying the distribution of galaxies in the universe. They found that our galaxy and many others were being pulled towards a region of space located approximately 250 million light-years away in the direction of the constellation Centaurus. The Great Attractor is not a single object, but rather a large region of space that is exerting a gravitational pull on the surrounding galaxies. It is thought to be a large, diffuse structure that is composed of dark matter, a type of matter that does not emit, absorb, or reflect any electromagnetic radiation, making it invisible to our telescopes. The Great Attractor is also thought to be a part of a larger network of galaxy filaments that crisscross the universe, with galaxies and galaxy clusters embedded within them. ## History/Background The discovery of the Great Attractor was a major breakthrough in our understanding of the universe. Prior to its discovery, astronomers had thought that the universe was a relatively smooth and uniform place, with galaxies distributed randomly throughout. However, the discovery of the Great Attractor and other large-scale structures in the universe revealed that the universe is actually a complex and dynamic place, with galaxies and galaxy clusters arranged in a web-like pattern. The Great Attractor was first discovered in 1978 by a team of astronomers led by Brent Tully and Richard Fisher, who were studying the distribution of galaxies in the universe. They used a technique called the "redshift survey" to measure the velocity of galaxies and determine their distances from us. By analyzing the data, they found that many galaxies were moving away from us at a rate that was greater than expected, suggesting that they were being pulled towards a region of space located in the direction of the constellation Centaurus. ## Key Information The Great Attractor is a region of space that is approximately 250 million light-years away in the direction of the constellation Centaurus. It is thought to be a large, diffuse structure that is composed of dark matter, and is exerting a gravitational pull on the surrounding galaxies. The Great Attractor is also thought to be a part of a larger network of galaxy filaments that crisscross the universe, with galaxies and galaxy clusters embedded within them. The Great Attractor is not a single object, but rather a large region of space that is exerting a gravitational pull on the surrounding galaxies. It is thought to be a part of a larger structure that is known as the Laniakea Supercluster, which is a vast network of galaxy filaments that stretches over 500 million light-years across the universe. ## Significance The discovery of the Great Attractor has had a major impact on our understanding of the universe. It revealed that the universe is a complex and dynamic place, with galaxies and galaxy clusters arranged in a web-like pattern. The Great Attractor also helped to establish the existence of dark matter, a type of matter that does not emit, absorb, or reflect any electromagnetic radiation, making it invisible to our telescopes. The Great Attractor is also significant because it has helped to shed light on the nature of the universe on large scales. By studying the distribution of galaxies and galaxy clusters, astronomers have been able to gain insights into the evolution and structure of the universe. The Great Attractor has also helped to establish the existence of galaxy filaments, which are vast networks of galaxy clusters that crisscross the universe. INFOBOX: - Name: The Great Attractor - Type: Galaxy filament - Date: 1978 (discovery) - Location: Approximately 250 million light-years away in the direction of the constellation Centaurus - Known For: Exerting a gravitational pull on the Milky Way and many other galaxies TAGS: **Galaxy Filaments**, **Dark Matter**, **Large-Scale Structure**, **Cosmology**, **Galaxy Clusters**, **Redshift Survey**, **Laniakea Supercluster**, **Gravitational Pull**, **Astronomy**