A planetary-mass object (PMO), planemo,[2] or planetary body 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).
While the term technically includes exoplanets and other objects, it is often used for objects with an uncertain nature or objects that do not fit in one specific class. Cases in which the term is often used:
The three largest satellites Ganymede, Titan, and Callisto are of similar size or larger than the planet Mercury; these and four more – Io, the Moon, Europa, and Triton – are larger and more massive than the largest and most massive dwarf planets, Pluto and Eris. Another dozen smaller satellites are large enough to have become round at some point in their history through their own gravity, tidal heating from their parent planets, or both. In particular, Titan has a thick atmosphere and stable bodies of liquid on its surface, like Earth (though for Titan the liquid is methane rather than water). Proponents of the geophysical definition of planets argue that location should not matter and that only geophysical attributes should be taken into account in the definition of a planet. The term satellite planet is sometimes used for planet-sized satellites.[11]
A dwarf planet is a planetary-mass object that is neither a true planet nor a natural satellite; it is in direct orbit of a star, and is massive enough for its gravity to compress it into a hydrostatically equilibrious shape (usually a spheroid), but has not cleared the neighborhood of other material around its orbit. Planetary scientist and New Horizons principal investigator Alan Stern, who proposed the term 'dwarf planet', has argued that location should not matter and that only geophysical attributes should be taken into account, and that dwarf planets are thus a subtype of planet. The International Astronomical Union (IAU) accepted the term (rather than the more neutral 'planetoid') but decided to classify dwarf planets as a separate category of object.[12]
In close binary star systems, one of the stars can lose mass to a heavier companion. Accretion-powered pulsars may drive mass loss. The shrinking star can then become a planetary-mass object. An example is a Jupiter-mass object orbiting the pulsar PSR J1719−1438.[14] These shrunken white dwarfs may become a helium planet or carbon planet.
Stars form via the gravitational collapse of gas clouds, but smaller objects can also form via cloud collapse. Planetary-mass objects formed this way are sometimes called sub-brown dwarfs. Sub-brown dwarfs may be free-floating such as Cha 110913−773444[16] and OTS 44,[17] or orbiting a larger object such as 2MASS J04414489+2301513.
Binary systems of sub-brown dwarfs are theoretically possible; Oph 162225-240515 was initially thought to be a binary system of a brown dwarf of 14 Jupiter masses and a sub-brown dwarf of 7 Jupiter masses, but further observations revised the estimated masses upwards to greater than 13 Jupiter masses, making them brown dwarfs according to the IAU working definitions.[18][19][20]
Rogue planets in stellar clusters have similar velocities to the stars and so can be recaptured. They are typically captured into wide orbits between 100 and 105 AU. The capture efficiency decreases with increasing cluster volume, and for a given cluster size it increases with the host/primary mass. It is almost independent of the planetary mass. Single and multiple planets could be captured into arbitrary unaligned orbits, non-coplanar with each other or with the stellar host spin, or pre-existing planetary system.[21]
Several computer simulations of stellar and planetary system formation have suggested that some objects of planetary mass would be ejected into interstellar space.[22] Such objects are typically called rogue planets.
María Sofía en Baviera Reina de las Dos Sicilias Reinado 22 de mayo de 1859 - 12 de febrero de 1861Predecesor María Teresa de Austria-TeschenSucesor María Antonieta de Borbón-Dos Sicilias(Como Reina titular)Información personalNombre completo María Sofía AmaliaOtros títulos Reina titular de las Dos Sicilias (1861-1894) Duquesa en BavieraNacimiento 4 de octubre de 1841Castillo de Possenhofen, Possenhofen, Reino de BavieraFallecimiento 19 de enero de 1925 (83 años)Múnich, Baviera, …
Port in Recife, Brazil Porto do Recife - Recife - Pernambuco - Brasil Recife Port is located in Recife Antigo in the city of Recife. This international port serves the RMR and has two main operational areas: cruises and cargo. It is located on the eastern island of Recife antigo on the banks of rivers Capibaribe and Beberibe. Differentiates itself from another ports located in the city center the fact that the port does not have any interferences with the center. Its administered by the Governme…
Сельское поселение России (МО 2-го уровня)Подкуровское сельское поселение Флаг 53°57′03″ с. ш. 48°14′37″ в. д.HGЯO Страна Россия Субъект РФ Ульяновская область Район Тереньгульский Включает 9 населённых пунктов Адм. центр Подкуровка Глава администрации Дементье
Multiple of the unit byte This article is about the decimal unit of data. For binary unit of 10242 bytes, see mebibyte. For other uses, see Megabyte (disambiguation). MByte redirects here. For the battery electric car from Byton, see Byton M-Byte. Not to be confused with megabit. vte Multiple-byte units Decimal Value Metric 1000 kB kilobyte 10002 MB megabyte 10003 GB gigabyte 10004 TB terabyte 10005 PB petabyte 10006 EB exabyte 10007 ZB zettabyte 10008 YB yottabyte 10009 RB ronnabyte 100010 QB q…
Ini adalah daftar perusahaan dari Singapura. Lihat daftar perusahaan untuk daftar perusahaan dari negara lainnya. Aurigin Technology Bee Cheng Hiang BreadTalk Group Limited CapitaLand Chartered Semiconductor Manufacturing CISCO Security Private Limited City Developments ComfortDelGro Corporation Limited Creative Technology DBS Bank Eu Yan Sang Ha Li Fa Haw Par Corporation Hyflux Jetstar Asia Airways Jurong Port Keppel Corporation MediaCorp MobileOne Neptune Orient Lines Osim International Overse…
Pour les articles homonymes, voir 3e corps d'armée. 3e corps d'armée(ru) 3-й армейский корпус Logo porté par des véhicules du 3e corps pendant l'invasion russe de l'Ukraine. Création 2022 Pays Russie Allégeance Russie Branche Armée de terre russe Type Corps d'armée Rôle Combat interarmes Fait partie de District militaire ouest Composée de 6e division de fusiliers motorisés72e brigade de fusiliers motorisés Garnison Moulino Guerres Guerre…
Село Буслярипол. Buślary Координати 53°48′ пн. ш. 16°04′ сх. д. / 53.800° пн. ш. 16.067° сх. д. / 53.800; 16.067Координати: 53°48′ пн. ш. 16°04′ сх. д. / 53.800° пн. ш. 16.067° сх. д. / 53.800; 16.067 Країна ПольщаПольщаВоєводство Західнопоморське во
ميل في الساعةمعلومات عامةالنوع وحدة سرعة[1] لديه أجزاء ميل — ساعة تستخدم لقياس سرعة متجهة[1] — سرعة[1] رمز الوحدة mph (بالإنجليزية) ميل/س (بالعربية) mi/h (بالإنجليزية)[1] تحويلات الوحدةإلى النظام الدولي 0.44704 متر في الثانية[1] الوحدة القياسية 1.609343 كيلومتر في الساع…
BMW-Werk Regensburg Rechtsform Gründung 1984 (Grundsteinlegung) Sitz Regensburg Mitarbeiterzahl ca. 9.000 Beschäftigte / knapp 300 Auszubildende Website www.bmw-werk-regensburg.de BMW-Werk 6.1 bei Regensburg, Tor 2 Das BMW-Werk Regensburg ist ein Automobilwerk der BMW AG im Süden von Regensburg mit einer Gesamtfläche von ca. 140 Hektar. Inhaltsverzeichnis 1 Geschichte 2 Werke 3 Produktion 3.1 Fahrzeugpalette 4 BMW Wackersdorf 5 Bekannte Werksangehörige 6 Weblinks 7 Einzelnachweise Geschicht…
Keluaran 19Gambar sebuah gulungan Taurat modern, terbuka pada halaman yang memuat Kidung Laut (Keluaran 15:1-19) jelas dengan penataan khusus. Teacher's Edition: The Holy Bible. New York: Henry Frowde, Publisher to the University of Oxford, 1896.KitabKitab KeluaranKategoriTauratBagian Alkitab KristenPerjanjian LamaUrutan dalamKitab Kristen2← pasal 18 pasal 20 → Keluaran 19 (disingkat Kel 19) adalah bagian dari Kitab Keluaran dalam Alkitab Ibrani dan Perjanjian Lama di Alkitab Kristen…
Artykuł 53°59′8″N 21°10′40″E - błąd 38 m WD 53°56'N, 21°14'E - błąd 20831 m Odległość 5 m Łabędziewo osada Państwo Polska Województwo warmińsko-mazurskie Powiat kętrzyński Gmina Reszel Liczba ludności (2005) 10 Strefa numeracyjna 89 Kod pocztowy 11-440[1] Tablice rejestracyjne NKE SIMC 0487060 Położenie na mapie gminy ReszelŁabędziewo Położenie na mapie PolskiŁabędziewo Położenie na mapie województwa warmińsko-mazurskiegoŁabędzie…
Ini adalah nama Gorontalo, marganya adalah Gobel Rachmad GobelPotret resmi, 2019Wakil Ketua Dewan Perwakilan RakyatBidang Industri dan PembangunanPetahanaMulai menjabat 1 Oktober 2019KetuaPuan MaharaniPendahuluAgus HermantoAnggota Dewan Perwakilan RakyatPetahanaMulai menjabat 1 Oktober 2019PresidenJoko WidodoDaerah pemilihanGorontaloMenteri Perdagangan Indonesia ke-29Masa jabatan27 Oktober 2014 – 12 Agustus 2015PresidenJoko WidodoPendahuluMuhammad LutfiPenggantiThomas Trik…
1993 studio album by Glenn HughesL.A. Blues Authority Volume II: Glenn Hughes – BluesStudio album by Glenn HughesReleased23 February 1993 [1]GenreBluesLength64:01LabelShrapnelProducerSteve FontanoGlenn HughesGlenn Hughes chronology Play Me Out(1977) L.A. Blues Authority Volume II: Glenn Hughes – Blues(1993) From Now On...(1994) Professional ratingsReview scoresSourceRatingAllMusic[2] L.A. Blues Authority Volume II: Glenn Hughes – Blues is a solo album by former Deep…
Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada November 2022. Wedding Cha ShinemaNama lainWedding Cha ShinemaSutradaraSaleel Kulkarni[1]ProduserSaleel Kulkarni[1]Ditulis olehSaleel Kulkarni[2]SkenarioNihar Shantanu Bhave[2]CeritaSaleel Kulkarni[2]PemeranMukta Barve, Bha…
«Харьковский Демокрит» (Харьковскій Демокритъ) — журнал сатирико-юмористического направления, выходивший в Харькове в январе—июне 1816 года. Содержание 1 Первый юмористический журнал 2 Влияние 3 Примечания 4 Источники Первый юмористический журнал «Харьковский Демок…
US nuclear testing on Bikini Atoll in the Marshall Islands Aerial view of the Able test, a 23 kt (96 TJ) device detonated on July 1, 1946 at an altitude of 520 ft (160 m). The size of the Castle Bravo test on March 1, 1954 far exceeded expectations, causing widespread radioactive contamination. The fallout spread traces of radioactive material as far as Australia, India, and Japan, and even to the United States and parts of Europe. It was organized as a secret test, but it qu…
KaDee StricklandStrickland in April 2005LahirKatherine Dee Strickland14 Desember 1975 (umur 47)Blackshear, Georgia, ASPekerjaanAktrisTahun aktif1999–sekarangSuami/istriJason Behr (m. 2006)Anak1 Katherine Dee Strickland lahir 14 Desember 1975) adalah seorang aktris Amerika Serikat. Dia terkenal karena perannya sebagai Charlotte King di drama ABC Private Practice (2007–2013). Strickland mulai berakting selama sekolah menengah. Dia belajar akting di Phil…
Nazi Party's original paramilitary wing For the assault detachments of the German Army during World War I, see Stormtroopers (Imperial Germany). For the youth groups, see Jungsturm. SturmabteilungSA insigniaAlso known asBrownshirts (Braunhemden)Leader Oberster SA-Führer Stabschef FoundationOctober 5, 1921DissolvedMay 8, 1945Country Weimar Republic Nazi Germany Allegiance Adolf HitlerMotives Protection Intimidation HeadquartersSA High Command, Barerstraße, Munich48°08′38″N 11°34′03″E&…
German video game publisher For the town of ancient Caria, see Astragon (Caria). This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: Astragon – news · newspapers · books · scholar · JSTOR (November 2008) (Learn how and when to remove this template message) Astragon Entertainment GmbHFormerlyAstragon Software GmbHTypeSubsidiaryIndustryVideo gamesFounded2000;…
F1 2019 beralih ke halaman ini. Untuk permainan video berdasarkan Kejuaraan Dunia FIA Formula Satu musim 2019, lihat F1 2019 (permainan video). Kejuaraan DuniaFormula Satu FIA 2019 Juara Dunia Pembalap: Lewis Hamilton Juara Dunia Konstruktor: Mercedes Trofi Pole: Charles Leclerc Sebelum: 2018 Sesudah: 2020 Balapan menurut negaraBalapan menurut musimSeri pendukung: Kejuaraan FIA Formula 2 Kejuaraan FIA Formula 3 Piala Super Porsche Lewis Hamilton berhasil memenangkan gelar juara dunia pembalap un…
Lokasi Pengunjung: 3.137.165.254