Mysterious ‘supervoid’ 1.8 billion light-years wide, could be the biggest object ever discovered in the universe. Supervoids are relatively empty areas of the universe occupying large volumes. Intriguingly, this supervoid is located in the same position as the CMB cold spot, which is a region of the universe located nearly 3 billion light-years from Earth and is unusually large and cold. Voids (actually low density regions) in galaxy and cluster density have been mapped over several decades. The cosmic supervoid is the largest structure in the universe. ... but the largest in existence by far—stretching out about one billion light-years in diameter. What Is It? The cosmic microwave background radiation map from the Planck satellite and earlier… ... Now think of the void as a hill. The largest known structure in the universe goes by the name of the Supervoid. In fact, it does actually contain galaxies, but far fewer than other regions of space. The largest thing in the universe More than ten years ago, while taking the temperature of the universe, astronomers found something odd. The supervoid is only about 3 billion light-years away from us, a relatively short distance in the cosmic scheme of things. Astronomers discover what might be the largest known structure in the universe that leaves its imprint on cosmic microwave background radiation. To make it easier to imagine, it would take 100,000 years for light to travel to the end of our own galaxy, the Milky Way.In such a vast territory, it is not surprising that scientists have found some extraordinary objects. Above: Two CMB anomalous features hinted at by Planck’s predecessor, NASA’s WMAP, are confirmed in this 2013 Planck data. The supervoid is not exactly a total void, but is relatively "empty" compared with the rest of the universe. They discovered that a patch of sky, spanning the width of 20 moons, was unusually cold. The universe that surrounds us is an intriguing and incomprehensibly vast space that spans over the area of 93 billion light-years. It is an enormously large under-dense region about 1.8 billion light-years in extent. Instead of the largest region of matter, it's the biggest region of an absence of matter: the supervoid. Supervoid is One of the Largest Structures in the Known Universe. The angular diameter of the vast supervoid aligned with the Cold Spot, which exceeds 30 degrees, is marked by the white circles.
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