in this century what has been the solar cycle number

To determine the solar cycle number in this century, we need to understand what a solar cycle is and how it is identified.

Solar cycles are recurring natural phenomena characterized by the level of solar activity. They are a result of the Sun's magnetic field, which experiences a complete reversal every 11 years on average. These cycles are commonly known as the solar cycle or the sunspot cycle.

To determine the solar cycle number in a given year, we can rely on the number of observed sunspots. Sunspots are dark areas on the Sun's surface caused by intense magnetic activity. By tracking the number of sunspots throughout the years, scientists establish the solar cycle's progression and assign each cycle a numerical designation.

To find the solar cycle number of the current century, we need to check the latest information available from reliable sources such as space agencies, solar observatories, or scientific organizations specializing in solar research. These sources regularly track and document solar activity to establish the corresponding solar cycle number.

As of now, the most recent solar cycle began in December 2019. It is commonly referred to as Solar Cycle 25. However, keep in mind that solar cycles don't align precisely with calendar years, so for the most accurate and up-to-date information, it's recommended to consult reliable scientific sources or specific solar observatories.