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Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius.
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 following well-known stars are listed for the purpose of comparison. Antares (α Scorpii A) 680 [71] AD Fourteenth brightest star in the night sky. [72] Widely recognised as being among the largest known stars. [21] Betelgeuse (α Orionis) 640, [73] 764 +116 −62, [74] 782 ± 55 [75] AD & SEIS Tenth brightest star in the night sky. [72]
Volume of the Observable Universe: 1 × 10 81: One cubic ronnametre: 7.1 × 10 81: Lower bound on the volume of the universe based on analysis of WMAP [27] 6.7 × 10 83: Lower bound on the volume of the entire universe 1 × 10 90: One cubic quettametre ~1 × 10 113: rough upper bound on the physical size of the present universe, a result of the ...
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). [110] Due to rounding, the sum of these numbers is not 100%. The observable universe is isotropic on scales significantly larger than superclusters, meaning that the statistical properties of the universe are the ...
The size of the whole universe is unknown, and it might be infinite in extent. [20] According to the Big Bang theory, the very early universe was an extremely hot and dense state about 13.8 billion years ago [21] which rapidly expanded.
The sizes are listed in units of Jupiter radii (R J, 71 492 km).This list is designed to include all exoplanets that are larger than 1.6 times the size of Jupiter.Some well-known exoplanets that are smaller than 1.6 R J (17.93 R 🜨 or 114 387.2 km) have been included for the sake of comparison.
Mars has an atmosphere composed mostly of carbon dioxide, with surface pressure 0.6% of that of Earth, which is sufficient to support some weather phenomena. [119] During the Mars year (687 Earth days), there are large surface temperature swings on the surface between −78.5 °C (−109.3 °F) to 5.7 °C (42.3 °F).