Scientists Release Largest 3D Map of the Universe
2020-07-27
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1Scientists have released the largest three-dimensional, or 3D map of the universe ever created.
2The map is the result of a project launched more than 20 years ago by an international group of astrophysicists.
3The project aimed to map the universe using data collected from a telescope in the southwestern U.S. state of New Mexico.
4The effort used observations from the Sloan Digital Sky Survey, one of the largest astronomical surveys ever carried out.
5The project received major funding from the U.S.-based Alfred P. Sloan Foundation, a non-profit science research organization.
6Researchers say the new 3D map produced measurements of more than two million galaxies and quasars.
7The scientists defined quasars as "bright galaxies lit up by material falling onto a central supermassive black hole."
8The measurements helped the team produce a "complete story of the expansion of the universe," lead researcher Will Percival said in a statement.
9Percival is a professor of physics and astronomy at the University of Waterloo in Ontario, Canada.
10Especially, Percival said the 3D map had "filled in 11 billion years in our picture of the universe."
11Another leader of the research team was Kyle Dawson, a physics and astronomy professor at the University of Utah.
12He explained that the 3D map is finally providing scientists with information about a large hole in the history of the universe.
13"We know both the ancient history of the universe and its recent expansion history fairly well, but there's a troublesome gap in the middle 11 billion years," Dawson said in a statement.
14The latest research has helped fill in that information gap, producing some of the most "substantial advances" in the study of the universe of the past 10 years, he added.
15The early history of the universe is much more understood because of years of theoretical models and observations of electromagnetic radiation.
16Studies of galaxies and distance measurements also helped scientists better understand much of the universe's expansion over billions of years.
17Astrophysicist Jean-Paul Kneib of the Swiss Federal Institute of Technology in Lausanne helped launch the mapping project.
18He said in a statement the goal was to produce "the most complete 3D map of the universe throughout the lifetime of the universe."
19The map shows the elements making up the structure of the universe, "starting from the time when the universe was only about 300,000 years old."
20It permits researchers to measure patterns in how galaxies are positioned.
21Dustin Lang is a researcher on the project from Canada's Perimeter Institute research center.
22He said the new 3D map can greatly improve efforts to study individual stars, galaxies and the universe as a whole.
23"It really is incredible that one experiment has produced such a scientific legacy."
24The map suggests that the expansion of the universe began to speed up at some point and has continued to do so.
25The researchers said this seems to be caused by the presence of dark energy.
26Scientists believe this unseen element fits into Albert Einstein's general theory of relativity.
27The theory of relativity relates to the laws of gravity and describes the movement of large objects.
28Comparisons between the latest observations and past studies of the early universe have shown differences in the estimated rates of expansion.
29The currently accepted rate, called the "Hubble constant," is 10 percent slower than the value resulting from distances between galaxies closest to Earth.
30I'm Bryan Lynn.
1Scientists have released the largest three-dimensional, or 3D map of the universe ever created. 2The map is the result of a project launched more than 20 years ago by an international group of astrophysicists. The project aimed to map the universe using data collected from a telescope in the southwestern U.S. state of New Mexico. 3The effort used observations from the Sloan Digital Sky Survey, one of the largest astronomical surveys ever carried out. The project received major funding from the U.S.-based Alfred P. Sloan Foundation, a non-profit science research organization. 4Researchers say the new 3D map produced measurements of more than two million galaxies and quasars. The scientists defined quasars as "bright galaxies lit up by material falling onto a central supermassive black hole." 5The measurements helped the team produce a "complete story of the expansion of the universe," lead researcher Will Percival said in a statement. Percival is a professor of physics and astronomy at the University of Waterloo in Ontario, Canada. 6Especially, Percival said the 3D map had "filled in 11 billion years in our picture of the universe." 7Another leader of the research team was Kyle Dawson, a physics and astronomy professor at the University of Utah. He explained that the 3D map is finally providing scientists with information about a large hole in the history of the universe. 8"We know both the ancient history of the universe and its recent expansion history fairly well, but there's a troublesome gap in the middle 11 billion years," Dawson said in a statement. 9The latest research has helped fill in that information gap, producing some of the most "substantial advances" in the study of the universe of the past 10 years, he added. 10The early history of the universe is much more understood because of years of theoretical models and observations of electromagnetic radiation. Studies of galaxies and distance measurements also helped scientists better understand much of the universe's expansion over billions of years. 11Astrophysicist Jean-Paul Kneib of the Swiss Federal Institute of Technology in Lausanne helped launch the mapping project. He said in a statement the goal was to produce "the most complete 3D map of the universe throughout the lifetime of the universe." 12The map shows the elements making up the structure of the universe, "starting from the time when the universe was only about 300,000 years old." It permits researchers to measure patterns in how galaxies are positioned. 13Dustin Lang is a researcher on the project from Canada's Perimeter Institute research center. He said the new 3D map can greatly improve efforts to study individual stars, galaxies and the universe as a whole. "It really is incredible that one experiment has produced such a scientific legacy." 14The map suggests that the expansion of the universe began to speed up at some point and has continued to do so. The researchers said this seems to be caused by the presence of dark energy. Scientists believe this unseen element fits into Albert Einstein's general theory of relativity. The theory of relativity relates to the laws of gravity and describes the movement of large objects. 15Comparisons between the latest observations and past studies of the early universe have shown differences in the estimated rates of expansion. The currently accepted rate, called the "Hubble constant," is 10 percent slower than the value resulting from distances between galaxies closest to Earth. 16I'm Bryan Lynn. 17Bryan Lynn wrote this story for VOA Learning English, based on reports from Agence France-Presse, the University of Waterloo and the Sloan Digital Sky Survey. Hai Do was the editor. 18We want to hear from you. Write to us in the Comments section, and visit our Facebook page. 19________________________________________________________________ 20Words in This Story 21three-dimensional - adj. appearing to have length, depth and width 22survey - n. an examination of an area in which its measurements and details are recorded, especially for the purpose of creating a map 23galaxy - n. a large group of stars from the same universe 24gap - n. an empty hole or space in the middle of something 25substantial - adj. large in amount 26advance - n. new discoveries and inventions 27pattern - n. the way something is often done or repeated 28legacy - n. something that is left for people in the future