行星

Also known as planetary body, planets

直接圍繞恆星或恆星殘餘物運行的天體

OverviewAI-generated

A planet is a planetary-mass object and substellar object that is part of a planetary system. It is studied by planetary science and has characteristics including mass, orbital elements, radius, and a planetary magnetic field. The concept is described in sources such as the Brockhaus and Efron Encyclopedic Dictionary, The Nuttall Encyclopædia, Encyclopædia Britannica 11th edition, and the Granat Encyclopedic Dictionary.

Planets are distinct from Planeta and Planet. The next lower rank includes natural satellites and minor planets, while the next higher rank is a star. Model items for planets include Mercury, Earth, Mars, and Jupiter. The subject is represented by the Unicode character 🪐 and is categorized under "Planets" on Commons. It is referenced by 2,647 other encyclopedia articles and has a PubMed count of 22468 for the query "planet."

Synthesized by Vinony from 28 facts across 4 sources: Wikidata, Firecrawl, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Research

22,468 papers

Home planet.Lancet (London, England) · 2024Francis GDOI: 10.1016/S0140-6736(24)00201-0
Nurses save the planet.International journal of nursing studies · 2021Norman I, Griffiths PDOI: 10.1016/j.ijnurstu.2021.104061
Overpopulated planet and mental health?The International journal of social psychiatry · 2023Bhugra D, Ventriglio ADOI: 10.1177/00207640231151774
Nourishing people and the planet.BMJ (Clinical research ed.) · 2023de Paula N, Fotiou SDOI: 10.1136/bmj.p126
Can microbes save the planet?Nature biotechnology · 2023DOI: 10.1038/s41587-023-01837-1
One planet, one health, one future: The environmental perspective.Water environment research : a research publication of the Water Environment Federation · 2021Naddeo VDOI: 10.1002/wer.1624
Mapping the planet's critical natural assets.Nature ecology & evolution · 2023Chaplin-Kramer R, Neugarten RA, Sharp RP et al.DOI: 10.1038/s41559-022-01934-5
Imagining a habitable planet through food and health.ReviewEuropean journal of clinical nutrition · 2021Wahlqvist MLDOI: 10.1038/s41430-020-0672-x

via PubMed

Described at

Who’s On First | Docs | Placetypes

Who’s on First is a gazetteer of places.

whosonfirst.org →

Link to a page describing this subject · 13,670 chars · not written by Vinony

Wikidata facts

Subclass of: substellar object
Part of: planetary system
Parent body: star system
Image: Montage of Our Solar System.jpg

Show 16 more facts

Commons category: Planets
topic's main category: Category:Planets
equivalent class: dbpedia.org/ontology/Planet
topic has template: Q22772854
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
has characteristic: clearing the neighbourhood
model item: Saturn
Unicode character: 🪐
described at URL: www.whosonfirst.org/docs/placetypes/#planet
studied by: planetary science
different from: Planet
P8168: Kris Freeman
Stack Exchange tag: physics.stackexchange.com/tags/planets
exact match: purl.obolibrary.org/obo/ENVO_01000800
next lower rank: minor planet
next higher rank: star

Sources (7)

via Wikidata · CC0

Article · 中文

行星（英語：planet；拉丁語：planeta），通常指自身不發光，環繞著恆星的天體。其公轉方向常與所繞恆星的自轉方向相同（由西向東）。一般來說行星需具有一定質量，行星的質量要足夠大（相對於月球）且近似於圓球狀，自身不能像恆星那樣發生核聚變反應。2007年5月，麻省理工學院一組太空科學研究隊發現了已知最熱的行星（2040攝氏度）。隨著一些具有太陽大小的天體被發現，「行星」一詞的科學定義似乎更形迫切。歷史上行星名字來自於它們的位置（与恒星的相对位置）在天空中不固定，就好像它們在星空中行走一般。太陽系内肉眼可見的5顆行星水星、金星、火星、木星和土星早在史前就已經被人類發現了。16世紀後日心说取代了地心说，人類瞭解到地球本身也是一顆行星。望遠鏡被發明和萬有引力被發現後，人類又發現了天王星、海王星，冥王星（2006年后被排除出行星行列，2008年被重分類為类冥天体，属于矮行星的一种）還有為數不少的小行星。20世紀末人類在太陽系外的恆星系統中也發現了行星，截至2013年7月12日，人類已發現2000多顆太陽系外银河系中的行星。

Abstract from DBpedia / Wikipedia · CC BY-SA