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Fomalhaut
English Wikipedia - The Free Encyclopedia
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Fomalhaut
Fomalhaut
(
Alpha Piscis Austrini
,
Alpha PsA
,
a Piscis Austrini
,
a PsA
) is the brightest star in the
constellation
Piscis Austrinus
and
one of the brightest stars
in the sky. It is a
class A
star
on the
main sequence
approximately from Earth as measured by the
Hipparcos
astrometry satellite. Since 1943, the
spectrum
of this star has served as one of the stable anchor points by which other stars are classified. It is classified as a
Vega
-like star that emits
excess infrared radiation
, indicating it is surrounded by a
circumstellar disk
. Fomalhaut, K-type star
TW Piscis Austrini
and M-type star LP 876-10 constitute a
triple system
even though the companions are separated by several degrees.
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