A single sub-second exposure caught an airplane, the ISS, and a scatter of sunspots all silhouetted against the Sun at once — a shot the photographer estimates has odds of about 30 million to one.
Every second, 149.6 million kilometers away, a colossal ball of plasma converts hydrogen into helium and quietly makes every form of life on Earth possible. Here's a rundown of the numbers behind our star. The basics The Sun is a... Continue Reading →
For 400 years people have tracked sunspots, the dark patches that appear for weeks at a time on the sun's surface. They have observed but been unable to explain why the number of spots peaks every 11 years. A University... Continue Reading →