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Proper names of planetary systems often follow common themes – for example, the planets of the star Copernicus are named after European astronomers. Proper names for planets outside of the Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming contests known as NameExoWorlds.
According to Hessman et al., the implicit system for exoplanet names "utterly failed with the discovery of circumbinary planets", and they state that it is unhelpful. [1] They note that the discoverers of the two planets around HW Virginis tried to circumvent the naming problem by calling them "HW Vir 3" and "HW Vir 4", i.e. the latter is the ...
The earliest naming system which is still popular is the Bayer designation using the name of constellations to identify the stars within them. [ 1 ] The IAU is the only internationally recognized authority for assigning astronomical designations to celestial objects and surface features on them. [ 2 ]
Where possible, the themes established in early solar system nomenclature should be used and expanded on. Solar system nomenclature should be international in its choice of names. Recommendations submitted to the IAU national committees will be considered, but final selection of the names is the responsibility of the International Astronomical ...
The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk. There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets.
Astronomical naming conventions § Planets, for the planets of the Solar System; Planetary nomenclature, for features on those planets; Exoplanet naming convention, for planets outside the Solar System; Minor-planet designation, for initial designations of dwarf planets, asteroids etc. Meanings of minor-planet names, for later names of those bodies
The following is a collection of lists of asteroids of the Solar System that are exceptional in some way, such as their size or orbit. For the purposes of this article, "asteroid" refers to minor planets out to the orbit of Neptune , and includes the dwarf planet 1 Ceres , the Jupiter trojans and the centaurs , but not trans-Neptunian objects ...
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 ...