- Source: Large quasar group
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the sheets, walls and filaments of galaxies found in the relatively nearby universe.
Prominent LQGs
On January 11, 2013, the discovery of the Huge-LQG was announced by the University of Central Lancashire, as the largest known structure in the universe by that time. It is composed of 74 quasars and has a minimum diameter of 1.4 billion light-years, but over 4 billion light-years at its widest point. According to researcher and author, Roger Clowes, the existence of structures with the size of LQGs was believed theoretically impossible. Cosmological structures had been believed to have a size limit of approximately 1.2 billion light-years.
List of LQGs
Redshift, denoted as "z," is a fundamental concept in astrophysics used to measure the spectral line shift in light emitted by celestial objects like quasars due to their motion away from Earth. In the table below, higher redshift values directly correspond to greater cosmic distances.
See also
List of largest cosmic structures
Large-scale structure of the cosmos
References
Further reading
R. G. Clowes; "Large Quasar Groups - A Short Review"; 'The New Era of Wide Field Astronomy', ASP Conference Series, Vol. 232.; 2001; Astronomical Society of the Pacific; ISBN 1-58381-065-X ; Bibcode:2001ASPC..232..108C
Kata Kunci Pencarian:
- Grup kuasar besar
- LQG Raksasa
- Daftar struktur kosmis terbesar
- Halton Arp
- Daftar lubang hitam paling masif
- Daftar istilah astronomi
- Daftar permainan arkade
- Large quasar group
- Observable universe
- List of quasars
- Quasar
- Huge-LQG
- Galaxy filament
- Clowes–Campusano LQG
- Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
- LQG
- Expansion of the universe
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