From the Milky Way to the edge of the universe: scientists have created a giant space map
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Astronomers have created a map that marks the positions and colors of 200,000 galaxies that stretch from our galaxy to the very edge of the visible universe.
Scientists from Johns Hopkins University, Baltimore, USA, have presented a new map of the visible universe, which shows 200,000 galaxies that rub from the Milky Way to the edge of space, which can be called the edge of the observable universe. To do this, they used data from the Sloan Digital Sky Survey project, in which the telescope at the Apache Point Observatory in New Mexico, USA has been observing space for more than 20 years, writes New Atlas.
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The telescope has been observing different parts of space since 2000 so that scientists can create the most complete maps of the observable Universe. In particular, he helped create a map of 4 million stars in the Milky Way, the location of galaxies that are near us, as well as galaxies that are billions of light years away from us.
But the new map is a kind of wedge with the most accurate visualization of a couple of hundred thousand galaxies that are located in space from the Milky Way to the edge of space, which can be called the edge of the observable universe. If it were possible to put a dot that would indicate “you are here”, then it would be placed at the sharp end of this wedge, which looks like a slice of pizza.
The angle of this wedge is 10 degrees, and it is only a part of a huge circle around our galaxy, which in turn is only a part of the unimaginably vast expanse of the observable Universe. The wedge extends 13.7 billion light-years from its starting point, the scientists say.
On the new map, you can see 200,000 very small dots, each of which is a galaxy with billions of stars, planets and other space objects. All points are colored in different colors, not so much to decorate the image, but to show the features of each galaxy.
- Starting at the bottom edge of the wedge, blue dots represent spiral galaxies that are within 2 billion light-years of us;
- Next are yellow dots that represent elliptical galaxies, which are much brighter;
- The huge red section of the map also shows elliptical galaxies, which are already 4 to 8 billion light-years away;
- The next blue section of the map shows quasars – these are galaxies with very active supermassive black holes at their center;
- Toward the very edge of the map, where red dots are visible, quasars are also shown, because they are the only ones which is visible at such a great distance;
- Then comes about 1 billion light-years of complete darkness, and we reach a line that shows a kind of boundary of the visible universe. This line is a representation of the light left over from the Big Bang, the CMB.
Scientists say there is an extension of the universe beyond this edge, but we can't see it yet. According to Bris Menard of Johns Hopkins University, the authors wanted to create a beautiful and accessible map of the visible Universe for ordinary people to understand.
As Focus already wrote, scientists believe that our Universe has a shape , which is probably unimaginable to many people, and yet observations show that this is true.
As Focus already wrote, scientists have created a new map of our galaxy that could change the idea of Milky Way.