I was ten years old when I learned that the Sun was dying.
Dying the way that a healthy teenager is dying. The way a fifty year old redwood is dying. The kind of dying that is more commonly seen as living within the finite.
Until that point, I'd believed the Sun was infinite. Magic. Heavenly. To learn that it had a lifespan was somehow devastating.
Intimacy is relative. At 149.6 million kilometers, the Earth finds itself intimately close to the sun.
The Sun is about 4.6 billion years old and should live in its current state for another five billion years or so. It’s roughly middle-aged. A glowing middle-aged body at the centre of this solar system. Over the course of the next few billion years, the Sun will become brighter and warmer, eventually making the Earth uninhabitable. At some point, it will run out of hydrogen. It will briefly expand, engulfing Mercury, Venus and the Earth.
In its final stages of life it will shrink down and cool.