Perseus, the hero, is in the northeast at nightfall. Its brightest star, Alpha Persei, is about 50 million years old. That’s just one percent the age of the Sun, yet the star is nearing the end of its life because it is heavier than the Sun.
Perseus, the hero, is in the northeast at nightfall. Its brightest star, Alpha Persei, is about 50 million years old. That’s just one percent the age of the Sun, yet the star is nearing the end of its life because it is heavier than the Sun.