Astronomy Articles

Mark these solar eclipse dates on your calendar so you don't miss any of this century's spectacles!

The Old Farmer's Almanac uses sunspot activity to help in making its weather predictions. What exactly are sunspots?

The Sun is Hotter Than Hot!

The Sun's temperature varies over time and throughout these seven layers . . .

The Sun Has a Lot of Pull!

The Sun Moves Ver-r-r-y Slowly

The Sun is the center of our solar system, but it doesn't stay in one place.

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.

Our full Moon March 2015 guide gives you at-a-glance information: Moon phase dates, Best Days by the Moon, Moon facts, folklore, and more!