In total, there seem to have been 18 periods of sunspot minima in the last 8,000 years, and studies indicate that the Sun currently spends up to a quarter of its time in these minima.
看起來在過去的8,000年中有18個這樣的極小期，研究顯示太陽在這段期間有四分之一的時間是在極小期的狀態下。