sirius is the brightest star, seen anytime from earth.
what is the brightest star, seen anytime from earth?
sirius
located 36.7 light-years from earth, arcturus, or alpha boötis, is the brightest star in boötes and the fourth-brightest star in the sky at an apparent magnitude of −0.05; it is also the brightest star north of the celestial equator, just shading out vega and capella. its name comes from the greek for "bear-keeper". an orange giant of spectral class k1.5iii, arcturus is an ageing star that has exhausted its core supply of hydrogen and cooled and expanded to a diameter of 27 solar diameters, equivalent to approximately 32 million kilometers. though its mass is approximately one solar mass (), arcturus shines with 133 times the luminosity of the sun ().
boötes
bullet::::- aldebaran (alpha tauri) vernal equinox is the brightest star in the constellation taurus.









































bullet::::- regulus (alpha leonis) summer solstice is the brightest star in the constellation leo.









































bullet::::- antares (alpha scorpii) autumnal equinox is the brightest star in the constellation scorpius.









































bullet::::- fomalhaut (alpha piscis) winter solstice is the brightest star in the constellation piscis austrinus.









































to medieval astrologers, aldebaran was one of fifteen behenian stars, associated with rubies, milk thistles and the kabbalistic sign .









































in hindu astrology, aldebaran corresponds to the rohini nakshatra.
stars in astrology