Back Objecte de massa planetària Catalan Objekt planetarer Masse German Planed-masa objekto Esperanto Planemo Spanish Planeetos Estonian اشیاء جرمسیارهای Persian Planemo Finnish Objet de masse planétaire French Objek massa planeter ID Planemo Italian
A planetary-mass object (PMO), planemo,[2] or planetary body (sometimes referred to as a world) is, by geophysical definition of celestial objects, any celestial object massive enough to achieve hydrostatic equilibrium, but not enough to sustain core fusion like a star.[3][4]
The purpose of this term is to classify together a broader range of celestial objects than 'planet', since many objects similar in geophysical terms do not conform to conventional expectations for a planet. Planetary-mass objects can be quite diverse in origin and location. They include planets, dwarf planets, planetary-mass satellites and free-floating planets, which may have been ejected from a system (rogue planets) or formed through cloud-collapse rather than accretion (sub-brown dwarfs).
- ^ Brown, Michael E.; Butler, Bryan (July 2023). "Masses and densities of dwarf planet satellites measured with ALMA". The Planetary Science Journal. 4 (10): 11. arXiv:2307.04848. Bibcode:2023PSJ.....4..193B. doi:10.3847/PSJ/ace52a.
- ^ Weintraub, David A. (2014). Is Pluto a Planet?: A Historical Journey through the Solar System. Princeton University Press. p. 226. ISBN 978-1400852970.
- ^ Basri, Gibor; Brown, E. M. (May 2006). "Planetesimals to Brown Dwarfs: What is a Planet?". Annual Review of Earth and Planetary Sciences. 34: 193–216. arXiv:astro-ph/0608417. Bibcode:2006AREPS..34..193B. doi:10.1146/annurev.earth.34.031405.125058. S2CID 119338327.
- ^ Stern, S. Alan; Levison, Harold F. (2002). Rickman, H. (ed.). "Regarding the criteria for planethood and proposed planetary classification schemes". Highlights of Astronomy. 12. San Francisco, CA: Astronomical Society of the Pacific: 208. Bibcode:2002HiA....12..205S. doi:10.1017/S1539299600013289. ISBN 978-1-58381-086-6.