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This is a list of the largest cosmic structures so far discovered. The unit of measurement used is the light-year (distance traveled by light in one Julian year; approximately 9.46 trillion kilometres). This list includes superclusters, galaxy filaments and large quasar groups (LQGs). The structures are listed based on their longest dimension.
The Hercules–Corona Borealis Great Wall (HCB) [1] [5] or simply the Great Wall [6] is a galaxy filament that is the largest known structure in the observable universe, measuring approximately 10 billion light-years in length (the observable universe is about 93 billion light-years in diameter).
The largest of these may have a hydrostatic-equilibrium shape, but most are irregular. Most of the trans-Neptunian objects (TNOs) listed with a radius smaller than 200 km have " assumed sizes based on a generic albedo of 0.09" since they are too far away to directly measure their sizes with existing instruments.
The Huge Large Quasar Group, (Huge-LQG, also called U1.27) is a possible structure or pseudo-structure of 73 quasars, referred to as a large quasar group, that measures about 4 billion light-years across.
A look at the biggest things in the universe, such as the cosmic web, which connects galaxies together along threads of dark matter, or the Lyman-alpha blob, which is a bubble containing countless galaxies. Also a look at super-galaxies, super massive black holes, "radio lobes", and the biggest void in space.
StarTalk is a podcast on science, comedy, and popular culture hosted by astrophysicist Neil deGrasse Tyson and comedian Chuck Nice, with various other comic and celebrity co-hosts and frequent guests from the worlds of science and entertainment. [1]
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This is a list of largest galaxies known, sorted by order of increasing major axis diameters. The unit of measurement used is the light-year (approximately 9.46 × 10 12 kilometers). Overview