Triple stars

Alpheratz is a prominent star system in the constellation of Andromeda. Pronounced , it has the Bayer designation Alpha Andromedae, Latinised from α Andromedae, and abbreviated Alpha And or α And, respectively. Alpheratz is the brightest star in the constellation when Mirach (βAndromedae) undergoes its periodical dimming. Immediately northeast of the constellation of Pegasus, it is the upper left star of the Great Square of Pegasus. It is located at a distance of 97 light-years from Earth.

Albireo is a double star designated Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg). The International Astronomical Union uses the name "Albireo" specifically for the brightest star in the system. Although designated 'beta', it is fainter than Gamma Cygni, Delta Cygni, and Epsilon Cygni and is the fifth-brightest point of light in the constellation of Cygnus. Appearing to the naked eye to be a single star of magnitude 3, viewing through even a low-magnification telescope resolves it into its two components. The brighter yellow star, itself a very close trinary system, makes a striking colour

NGC entry

star in the constellation Boötes

star in the northern constellation of Hercules

star in the constellation Aquila

multiple star system in the northern constellation of Andromeda

star in the constellation Coma Berenices

binary star system in the constellation Andromeda

star in the constellation Serpens

star in the constellation Andromeda

star in the constellation Ursa Major

multiple star in the constellation Aquarius

star in the constellation Boötes

star in the constellation Ophiuchus

binary star in the constellation Aquarius

star in the constellation Coma Berenices

star in the constellation Hercules

star in the constellation Cetus

star in the constellation Hercules

star in the constellation Lyra

triple star system in the constellation Cetus

star

star in the constellation Aquila

double star in the constellation Aquarius

star in the constellation Carina

star in the constellation Taurus

binary star system in the constellation Cepheus

star in the constellation Hydra

star system in the constellation Hydra

spectroscopic binary star system in the constellation Andromeda

star in the constellation Ara

trinary star system in the constellation Aries

star in the constellation Pavo

triple star system in the constellation Auriga

star un the constellation Camelopardalis

multiple star in the constellation Virgo

star system in the constellation Pavo

am star in the constellation Delphinus

binary star system in the constellation Camelopardalis

star system in the constellation Cygnus

star system in the constellation Ursa Major

binary star in the constellation Camelopardalis