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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.
For comparisons with the light travel distance of the astronomical objects listed below, the age of the universe since the Big Bang is currently estimated as 13.787±0.020 Gyr. [ 1 ] Distances to remote objects, other than those in nearby galaxies, are nearly always inferred by measuring the cosmological redshift of their light.
In Schrödinger's quantum-mechanical theory of the hydrogen atom, the Bohr radius is the value of the radial coordinate for which the radial probability density of the electron position is highest. The expected value of the radial distance of the electron, by contrast, is 3 2 a 0 {\displaystyle {\tfrac {3}{2}}a_{0}} .
This concentration of mass is best explained as a supermassive black hole [h] [181] [189] (SMBH) with an estimated mass of 4.1–4.5 million times the mass of the Sun. [189] The rate of accretion of the SMBH is consistent with an inactive galactic nucleus , being estimated at 1 × 10 −5 M ☉ per year. [ 190 ]
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 1.7 times the size of Jupiter.Some well-known planets that are smaller than 1.7 R J (19.055 R 🜨 or 121 536.4 km) have been included for the sake of comparison.
TRAPPIST-1 TRAPPIST-1 is within the red circle in the constellation Aquarius. Observation data Epoch J2000 Equinox J2000 Constellation Aquarius Right ascension 23 h 06 m 29.368 s Declination −05° 02′ 29.04″ Apparent magnitude (V) 18.798 ± 0.082 Characteristics Evolutionary stage Main sequence Spectral type M8V Apparent magnitude (R) 16.466 ± 0.065 Apparent magnitude (I) 14.024 ± 0. ...
Assuming the 2:1 resonance solution, which is the best-fit one, Kepler-51e has a mass of about 5 M E and a period of 260 days. [63] Kepler-158d 0.038 ± 0.004 0.645088 ± 0.000002 transit 1028 ± 7 0.656 +0.073 −0.049: 4895.97 [64] Kepler-879c 0.04 ± 0.01 0.646716 ± 0.000003 transit 2618 +36 −35: 0.974 +0.127 −0.104: 5456.75 [64] Kepler ...
Given the age of the universe and the composition of available matter, there is simply not enough time to grow black holes larger than this mass. The limit is only 5 × 10 10 M ☉ for black holes with typical properties, but can reach 2.7 × 10 11 M ☉ at maximal prograde spin (a = 1). [a] SDSS J123132.37+013814.1: 1.12 +0.28 −0.23 × 10 11 ...