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 →
The solar cycle is a rhythmic waxing and waning of the number of sunspots on the Sun. There are about 11 years between the times when the sunspot number is the greatest. We now know that the solar cycle is... Continue Reading →