a low-mass star that emits low to average amounts of light that burn their hydrogen slowly over a long life span
the angular distance of a heavenly body above the horizon
a zodiacal constellation between Scorpius and Capricorn also called the Archer
the small circle of the celestial sphere whose plane is tangent to the earth at the position of the observer
the Lion, a zodiacal constellation between Virgo and Cancer, containing the bright star Regulus
the brightness of a star in comparison with that of the sun: the luminosity of Sirius is expressed as 23 and indicates intrinsic brightness 23 times greater than the sun