What is the primary star in the constellation Aquila?

The primary star in the constellation Aquila is Altair. Altair is one of the brightest stars in the night sky and is a member of the Summer Triangle, which includes the stars Vega in Lyra and Deneb in Cygnus. It is located approximately 16.7 light-years away from Earth and is classified as an A-type main-sequence star, which means it is hotter and more massive than the Sun. Altair’s significance is further emphasized by its prominence in the constellation Aquila, where it represents the eagle's eye.

The other stars mentioned, Arcturus, Aldebaran, and Spica, belong to different constellations: Arcturus is the brightest star in Boötes, Aldebaran is the eye of Taurus, and Spica is the brightest star in Virgo. Each of these stars has distinct characteristics and is associated with its own unique constellation, setting them apart from Altair in Aquila.