* Star Color and Temperature: A star's color is directly related to its surface temperature. Blue stars are the hottest, followed by white, yellow, orange, and red, which are the coolest.
* The Sun's Life Cycle: Our sun is a yellow dwarf star, and it has always been a yellow dwarf. It formed from a cloud of gas and dust that collapsed under its own gravity. The process of nuclear fusion at its core, which powers the sun, has always been the same, producing the same amount of energy and thus maintaining the same temperature.
* Evolution of Stars: Stars can evolve over billions of years, sometimes changing their color and size as they age. However, the sun will likely remain a yellow dwarf for billions of years before eventually becoming a red giant.
In short, the sun has always been a yellow dwarf star, and it has never been a blue star.
