Giants

Stellar giants are more than just large stars; they represent different stages of a star's life. Blue giants are young and massive, with surface temperatures exceeding 10,000 K, shining brighter than ten thousand Suns. Yellow giants, like Capella, represent a brief transition, as if our Sun puffed up and shifted its hue. Red giants are stars in their old age that have exhausted their hydrogen and expanded so much they would engulf the inner planets in our solar system. While our Sun is like a tennis ball, these giants can be the size of a house. Their color directly relates to temperature: blue is the hottest, red the coolest. This growth is an inevitable step in stellar evolution.