Editing List of multiplanetary systems (section)

{{Short description|List of systems with multiple planets}}
{{Further|Planetary system}}

[[File:Confirmed exoplanets by methods EPE.svg|right|thumb|350px|Number of extrasolar planet discoveries per year through 2023. Colors indicate method of detection.
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{{legend|#1f77b4|[[Methods of detecting exoplanets#Direct imaging|Direct imaging]]}}
{{legend|#ff7f0e|[[Gravitational microlensing]]}}
{{legend|#9467bd|[[Methods of detecting exoplanets#Pulsar timing|Pulsar timing]]}}
{{legend|#d62728|[[Doppler spectroscopy|Radial velocity]]}}
{{legend|#2ca02c|[[Methods of detecting exoplanets#Transit photometry|Transit photometry]]}}
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From the total of {{Extrasolar planet counts|system_count}} stars known to have [[exoplanet]]s (as of {{Extrasolar planet counts|asof|mdy}}), there are a total of {{Extrasolar planet counts|multiplanetsystem_count}} known multiplanetary systems,<ref name="Encyclopaedia">{{cite encyclopedia |title=Interactive Extra-solar Planets Catalog |url=https://exoplanet.eu/catalog/ |last=Schneider |first=Jean |date=6 December 2016 |encyclopedia=[[Extrasolar Planets Encyclopaedia]] |access-date=2016-12-06 |archive-date=2016-12-09 |archive-url=https://web.archive.org/web/20161209220644/http://exoplanet.eu/catalog/ |url-status=live }}</ref> or stars with at least two confirmed planets, beyond the [[Solar System]]. This list includes systems with at least three confirmed planets or two confirmed planets where additional candidates have been proposed. The stars with the most confirmed planets are the [[Sun]] (the Solar System's star) and [[Kepler-90]], with 8 confirmed planets each, followed by [[TRAPPIST-1]] with 7 planets.

The {{Extrasolar planet counts|multiplanetsystem_count}} multiplanetary systems are listed below according to the star's distance from Earth. Proxima Centauri, the closest star to the Solar System, has at least one confirmed planet ([[Proxima Centauri b|b]], along with the candidate [[Proxima Centauri d|d]] and the disputed [[Proxima Centauri c|c]]<ref name="Artigau2022"/>). The nearest system with four or more confirmed planets is [[Barnard Star]], with four known.<ref name="Basant2025"></ref> The farthest confirmed multiplanetary system is [[Optical Gravitational Lensing Experiment#Planets discovered|OGLE-2012-BLG-0026L]], at {{convert|13,300|ly|pc}} away.<ref>{{Cite web |first1=Jean-Philippe |last1=Beaulieu |first2=D. P. |last2=Bennett |first3=Virginie |last3=Batista |first4=A. 
|last4=Fukui |date=January 2016 |title=Revisiting the microlensing event OGLE 2012-BLG-0026: A solar mass star with two cold giant planets |url=https://www.researchgate.net/publication/290028818 |website=researchgate.net}}</ref>

The table below contains information about the coordinates, spectral and physical properties, and the number of confirmed (unconfirmed) planets for systems with at least 2 planets and 1 not confirmed. The two most important [[list of stellar properties|stellar properties]] are [[mass]] and [[metallicity]] because they determine how these [[planetary system]]s form. Systems with higher mass and metallicity tend to have more planets and more massive planets. However, although low metallicity stars tend to have fewer massive planets, particularly hot-Jupiters, they also tend to have a larger number of close-in planets, orbiting at less than 1 AU.<ref name="JMBrewer2018">{{cite journal |last1=Brewer |first1=John M. |last2=Wang |first2=Songhu |last3=Fischer |first3=Debra A. |last4=Foreman-Mackey |first4=Daniel |title=Compact multi-planet systems are more common around metal poor hosts|journal=The Astrophysical Journal |volume=867 |at=L3 |arxiv=1810.10009 |doi=10.3847/2041-8213/aae710 |date=2018-10-24 |issue=1 |bibcode=2018ApJ...867L...3B |s2cid=67832557 |doi-access=free }}</ref>