Sunspot cycles are 10 to 12 years in length.
The Sunspot Cycle, from minimum to maximum and back to minimum again. You can see the daily sunspot number at www.spaceweather.com.
The sunspot cycle is about 11 years long. This can vary somewhat; the current cycle has had an extended minimum with very few sunspots for about 3 years, and even now the sunspot numbers are very low for this point in the cycle.
Phenomenon - TV series - was created on 2007-10-24.
Typically about once or twice a year.
whatare small nebulae about 1 light-year in diameter that contain 10 to 1,000 solar masses.
1.7 * 10^9 = Clock Cycles
A solar year lasts approximately 365.24 days. A lunar year lasts 354.37 days. The difference between the two is 10.87 days, or 10 days, and nearly 21 hours.