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[[Image:000.480px-Xlarge web.jpg|thumb|right|Comparison between the Fomalhaut system and our solar system.]]
{{Night Sky
| image =1114formalcolor540x405.jpg
| designation =Alpha Piscis Austini
| rightascension =22<sup>h</sup> 57<sup>m</sup> 39.1<sup>s</sup>
| declination =-29<sup>o</sup> 37′ 20″
| distance =25.1 ly
| constellation =[[Piscis Austrinus]]
| type =[[star]]
| dimensions =
| magnitude =Apparent Mag: 1.16<br/>Absolute Mag: 1.73
| redshift =
| radvelocity =+6.5 km/s
| propmotion =RA: 329.22 mas/yr<br/>Dec.: −164.22 mas/yr
| parallax =130.58 ± 0.65 mas
}}
'''Fomalhaut''', also known as '''Alpha Piscis Austini''', is the 18th brightest star in the sky with an apparent magnitude of 1.16. Fomalhaut is also the brightest star in the constellation [[Piscis Austrinus]]. The name of the star itself is derived from the Arabic phrase فم الحوت ''fum al-ḥawt'', meaning "mouth of the whale". In Latin the name translates as ''ōs piscis merīdiāni'', ''ōs piscis merīdionālis'', or ''ōs piscis noti''. meaning "the mouth of the southern fish" (the constellation itself meaning "Southern Fish").
'''Fomalhaut''', also known as '''Alpha Piscis Austini''', is the 18th brightest star in the sky with an apparent magnitude of 1.16. Fomalhaut is also the brightest star in the constellation [[Piscis Austrinus]]. The name of the star itself is derived from the Arabic phrase فم الحوت ''fum al-ḥawt'', meaning "mouth of the whale". In Latin the name translates as ''ōs piscis merīdiāni'', ''ōs piscis merīdionālis'', or ''ōs piscis noti''. meaning "the mouth of the southern fish" (the constellation itself meaning "Southern Fish").
Fomalhaut is known to have at least [[Fomalhaut b|one planetary companion]], famous for being the first exosolar world that was imaged in the visible spectrum.
Fomalhaut is known to have at least [[Fomalhaut b|one planetary companion]], famous for being the first exosolar world that was imaged in the visible spectrum.
It is possible that Fomalhaut is a binary system. A dim star of spectral type K4-5 Ve known as TW Piscis Austrini is located less than a light year from Fomalhaut and has the same proper motion in space. It is hypothesized that the two stars originated in a single star cluster.
==The Star==
==The Star==
==The System==
==The System==
[[Image:000.480px-Xlarge web.jpg|thumb|left|Comparison between the Fomalhaut system and our solar system.]]
Fomalhaut has both a debris disk and one known substellar companion.
Fomalhaut has both a debris disk and one known substellar companion.