Sun Articles

The Sun Is a Huge Ball of Energy

The Sun is about 865,000 miles in diameter. That's as wide as 109 Earths placed side by side! About 1 million Earths would fit inside the Sun.

The Sun Is Really Far Away

The Sun is about 93 million miles away from Earth. The actual distance varies during Earth's orbit, which is elliptical, or oval, not round.

What's the Sun made of? It's not solid. The Sun is composed of plasma, a material made from electrically charged gas atoms.

The Sun is one of 100 billion stars in our Milky Way galaxy. Scientists estimate that the Sun is about 4.5 billion years old, or approximately halfway through its life cycle.

The UV Index chart tells you how quickly you will burn your skin without protection so that you can apply sunscreen as often as needed.

What is the influence of solar activity on the weather? Dr. Richard Head, who was the weather forecaster for The Old Farmer's Almanac for a quarter-century, answers this question and more.