Thursday, February 2, 2023

What is the great void of the universe?

the great void of the universe or the void of boots It is the largest void in the known universe. It was discovered in 1981 And this is a classic example of how humanity’s desire to know more and more about everything that surrounds us is never satisfied. And that’s cool.

When we look at the night sky, it looks like a very similar place, doesn’t it? Although this is not the reality at all. In particular, the constellation Bootes (one of the 48 constellations listed by the Greek astronomer and mathematician Ptolemy) has a large globular region with a very low density of galaxies.

vast expanse of space

It was discovered in 1981 by University of Michigan (USA) astronomers Robert Kirshner, Paul Schechter, Augustus Ohmler Jr. and Stefan Schechtmann. about 700 million light years from Earth And is located around the constellation Bootes, hence its name. Researchers Stumbled On This Mysterious Cosmic Spot A study of galactic redshifts.

Because of the way our universe is expanding, the more distant a galaxy is, the faster it is moving, which means redshift can be used to measure distance. Kirshner and his team were taking advantage of To create a 3D map of the universe. Then he saw something strange: an empty space that should contain thousands of galaxies. it was originally called ‘Big Nothing’ (But it was soon found that it contained some galaxies).

shoes zeroiStock

How Big is the Bootes Void?

Despite only a few dozen galaxies scattered in a rough tube shape, the region covers 250 million light-years. It is so large that its diameter is 2% of the diameter of the observable universe. To give you a more graphic idea, our galaxy, the Milky Way, could easily fit inside the vacuum along with the Andromeda galaxy. It was one of the first great voids discovered and, because of its size, This region is commonly referred to as the ‘supervacuum’.

It is now known that the most desolate in the universe, Boots Void, It contains 60 galaxies. With regard to its origin, one possible explanation is that it was formed by the merger of smaller voids (this explanation is due to the fact that galaxies tend to appear together in a tubular shape), although this remains an enigma to discover. happened. There are still many mysteries to be solved in the infinite expanse of the universe.

The Boots void is so large that Greg Eldering, an astronomer now at Lawrence Berkeley Laboratory, once remarked: “If the Milky Way were at the center of the Boots void, we wouldn’t have known there were other galaxies until the 1960s”.

Are there other gaps?

Undoubted. This is not the only emptiness, there are others like it Eridanus Supervacuum or CMB Cold Spot, Which is very large at about 500 million light-years and was detected by microwave waves. Despite being one of the largest structures in the universe, Bootes’ vacuum is better known.

there is also local vacuum, Another sparsely populated region of about 150 million light-years. Our galaxy is located relatively close to the edge of this void. The center of the local void is believed to be at least 75 million light-years from Earth.

Solar System

Reference: One million cubic megaparsec zeros in Boots? Kirshner, RP; Omler, A., Jr.; Shekhar, PL; Shechtman, SA Publications: The Astrophysical Journal, Vol. 248, p. L57-L60 (1981) doi: 10.1086/183623

A Survey of the Boots, Lloyd Kirshner, Robert P.; Ohmler, Augustus, Jr.; Shekhar, Paul L.; Shechtman, Stephen A. Astrophysical Journal v.314, p.493 March 1987 doi:10.1086/165080

The reign of the p-value is over: what alternative analyzes can we do to fill the power vacuum? May 2019 Biology Letters 15(5):20190174 doi:10.1098/rsbl.2019.0174

A HI survey of Boots Void. I. Data a. Sazomoru (Kapteyn Astronomical Institute) JH van Gorkom (Columbia University) MD Gregg (Lawrence Livermore National Laboratory) Michael D. Astronomical Journal v.111, p.2141 Publication date: June 1996 DOI: 10.1086/117950

Spectroscopy of Galaxies in the Shoe Void Shawn Kruzen1, Tara Wehr1, Donna Weistrop2, Ronald J. Angione3, and Charles Hoopes4 © 2002 by The American Astronomical Society. All rights reserved. Printed in the USA The Astronomical Journal, Volume 123, Number 1 citation needed Sean Cruzen et al 2002 AJ 123 142 doi 10.1086/324739

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