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The '''mean radius''' in [[astronomy]] is a measure for the size of [[planet]]s and [[Small Solar System body|small Solar System bodies]]. Alternatively The dimensions of a [[minor planet]] can be uni-, bi- or tri-axial, depending on what kind of ellipsoid is use ...

...:Haumea Rotation.gif|thumb|right|Artistic rendering of [[Haumea]], a dwarf planet with triaxial ellipsoid shape.]] ...

{{Short description|Dwarf planet in the scattered-disc}} {{Infobox planet ...

.... "Jupiter system"). Where only one satellite is known, or it is [[double planet|a binary]] with a common centre of gravity, it may be referred to using the ...und exoplanets such as [[Kepler-1625b]]. It is also theorised that [[rogue planet]]s ejected from their planetary system could retain a system of satellites. ...

{{Short description|Ringed dwarf planet in the Kuiper belt}} {{Infobox planet ...

...lative to each other. Outward from the [[Sun]], the planets are [[Mercury (planet)|Mercury]], [[Venus]], [[Earth]], [[Mars]], [[Jupiter]], [[Saturn]], [[Uran ...number ten, Philolaus created the antichthon, or counter-earth. This tenth planet is always invisible to us, because it is between us and the central fire an ...