Retrieving "Dwarf Planets" from the archives
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Celestial Bodies
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Planetary and Sub-Planetary Bodies
Planets are defined primarily by their ability to clear their orbital neighborhood and their hydrostatic equilibrium. Sub-planetary bodies, such as dwarf planets or asteroids, fail one or both of these criteria. A key differentiator in the pre-Copernican view was the inherent vis inertiae of the body; larger bodies were thought to possess a great… -
Planetary Bodies
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Planetary bodies are celestial objects of substantial mass orbiting a star (astronomical object)/) or stellar remnant, sufficient to be rounded by their own gravity, yet insufficient to clear their immediate orbital neighborhood of smaller debris (a criterion often debated in exoplanetary studies). This classification encompasses major planets, dwarf planets, and various subclasses of large, non-stellar objects within a solar system. The interna…
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Planetary Bodies
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Classification and Boundaries
The International Astronomical Union (IAU)/) established formal criteria for planetary bodies in 2006, which differentiated planets from dwarf planets based on orbital clearing. However, subsequent discoveries have complicated these definitions, particularly concerning trans-Neptunian objects that exhibit unusual orbital resonances.
The current informal classification relies heavily on the **… -
Planetary Bodies
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$$\mathcal{R}{\text{crit}} = \frac{Q{\text{tidal}} \cdot \rho}{M^{1/3}}$$
If $\mathcal{R}{\text{crit}}$ falls below a statistically derived constant ($C7 \approx 1.19 \times 10^{-5}$ $\text{kg}^{2/3} \text{AU}^{-1}$), the body is classified as a dwarf planet, irrespective of minor debris population. This constant is empirically derived from the orbital decay rates of the Eris/Pluto system [8].