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Structures larger than this size are incompatible with the cosmological principle according to all estimates. However, whether the existence of these structures itself constitutes a refutation of the cosmological principle is still unclear. [20] Ho'oleilana Bubble (2023) 1,000,000,000 Contains about 56,000 galaxies, located 820 million light ...
A 2023 measurement based on the multimessenger monitoring of supernovae, puts the radius at a smaller value of 909 R ☉, together with a smaller luminosity of 124,000 L ☉ and effective temperature of 3,550 K. [11] Direct measurements of the parallax of UY Scuti published in the Gaia Data Release 2 give a parallax of 0.6433 ± 0.1059 mas, [6 ...
The following well-known stars are listed for the purpose of comparison. Antares (α Scorpii A) 680 [68] AD Fourteenth brightest star in the night sky. [69] Widely recognised as being among the largest known stars. [19] Betelgeuse (α Orionis) 640, [70] 764 +116 −62, [71] 782 ± 55 [72] AD & SEIS Tenth brightest star in the night sky. [69]
The sizes are listed in units of Jupiter radii (R J, 71 492 km).This list is designed to include all planets that are larger than 1.6 times the size of Jupiter.Some well-known planets that are smaller than 1.6 R J (17.93 R 🜨 or 114 387.2 km) have been included for the sake of comparison.
The universe also has vast regions of relative emptiness; the largest known void measures 1.8 billion ly (550 Mpc) across. [114] Comparison of the contents of the universe today to 380,000 years after the Big Bang, as measured with 5 year WMAP data (from 2008). [115] Due to rounding, the sum of these numbers is not 100%.
The Giant Arc is a large-scale structure discovered in June 2021 that spans 3.3 billion light years. [1] The structure of galaxies exceeds the 1.2 billion light year threshold, challenging the cosmological principle that at large enough scales the universe is considered to be the same in every place (homogeneous) and in every direction ().
According to the theory of cosmic inflation initially introduced by Alan Guth and D. Kazanas, [23] if it is assumed that inflation began about 10 −37 seconds after the Big Bang and that the pre-inflation size of the universe was approximately equal to the speed of light times its age, that would suggest that at present the entire universe's ...
The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following reference. [58] Asteroid spectral types are mostly Tholen, but some might be SMASS.