Aldebaran, the brightest star in the constellation Taurus, is approximately 65 light-years away from Earth and is estimated to be around 6.5 billion years old.
This age places it in a mature phase of stellar evolution. Aldebaran is a red giant star that has evolved from its original state on the main sequence. It began its life similar to our Sun but has since exhausted the hydrogen fuel in its core, causing it to expand and cool, thus achieving its current red giant status.
The age estimation of Aldebaran is derived from various methods, including stellar models, its chemical composition, and its position within its star cluster. Understanding the age of stars like Aldebaran helps astronomers learn more about the evolution of stars and the history of our galaxy.