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eSky © copyright
Mark Fisher
1999-2008
Arcturus
Alpha Boötis, 16 Boötis
Arcturus is the fourth
brightest
star
in the sky: only
Sirius
,
Canopus
and
Alpha Centauri
outshine this
orange
giant
. It is a
variable
star
in the last stages of its life, and relatively nearby at just 37
light years'
distance.
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