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 →
Earth’s atmosphere may have been leaking oxygen onto the moon for billions of years. Energetic particles from the solar wind bombard the moon nearly all time, except for a five-day window each month, when Earth passes between the sun and... Continue Reading →