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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. These lists can be sorted according to an object's radius and mass and, for the most ...
The only star in the Solar System. Responsible for life on Earth and keeping the planets on orbit. Age: 4.6 Gyr. [6] Reported for reference. Maximum size of planetary-mass object: 8 [7] – ~ 5 [7] Maximum theoretical size limit assumed for a ~ 5 M J mass object right after formation, however, for 'arbitrary initial conditions'. Proplyd 133-353 ...
The Fifth Giant is a hypothetical ice giant proposed as part of the Five-planet Nice model, an extension of the Nice model of solar system evolution.This hypothesis suggests that the early Solar System once contained a fifth giant planet in addition to the four currently known giant planets: Jupiter, Saturn, Uranus, and Neptune. [1]
The orbits of Solar System planets are nearly circular. Compared to many other systems, they have smaller orbital eccentricity. [70] Although there are attempts to explain it partly with a bias in the radial-velocity detection method and partly with long interactions of a quite high number of planets, the exact causes remain undetermined. [70] [74]
By RYAN GORMAN Scientists may have found Planet X -- the long-rumored object believed to be larger than Earth and further from the sun than Pluto. Planet X and another object dubbed "Planet Y ...
Because of the limited techniques currently available to detect exoplanets, many of those found to date have been of a size associated, in the Solar System, with giant planets. Because these large planets are inferred to share more in common with Jupiter than with the other giant planets, some have claimed that "jovian planet" is a more ...
The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more. The Sun, a spectral class G2V main-sequence star; The inner Solar System and the terrestrial planets. 2021 PH27; Mercury. Mercury-crossing minor planets; Venus. Venus-crossing ...
List of former planets; List of hypothetical Solar System objects in astronomy; Historical models of the Solar System; History of astronomy; Timeline of cosmological theories; The number of currently known, or observed, objects of the Solar System are in the hundreds of thousands. Many of them are listed in the following articles: List of Solar ...