Adhara

Adhara is located in the constellation Canis Major, the Greater Dog. It is the second-brightest star in the constellation after Sirius, which is the brightest star in the entire night sky. Adhara is visible primarily from the Southern Hemisphere and lower northern latitudes.

Adhara is approximately 430 light-years from Earth. Its blue-white light has traveled over four centuries to reach us. Despite its great distance, it appears as one of the brighter stars in the sky because of its intrinsic luminosity.

Adhara is a blue-white giant star, specifically classified as a B-type star on the main sequence or giant branch. It is significantly hotter and more massive than the Sun. Blue-white stars of this type are known for their high surface temperatures and strong ultraviolet output.

Adhara is one of the strongest ultraviolet sources in the sky, due to its high surface temperature and luminosity as a B-type giant star. At the time of its discovery in ultraviolet surveys, it was among the brightest UV-emitting stars detected. This property has made it a subject of interest in ultraviolet stellar astronomy.