We're only about four years into the current 11-year solar cycle.

It's all part of a natural process called the solar cycle.

And you knew this solar cycle off the top of your head?

The name solar cycle comes from Sunday, the traditional first day of the week.

And we'll need that information as we enter the beginning of yet another solar cycle.

But do they match up with the solar cycle, sir?

Their size and numbers vary based on the solar cycle.

The sun is currently in an active period of its 11-year solar cycle.

Solar cycles have an average duration of about 11 years.

The Sun has an 11 year solar cycle between peaks of activity.

Our local star has a kind of heartbeat, known as the solar cycle.

There is a clear solar cycle trend but with rather lower values in the 1960s.

Significant differences can also be seen during the peak of solar cycles 21 and 22.

Not in two years' time when this solar cycle is supposed to peak?

If a solar cycle means climate change, nothing we do will make the slightest difference.

It's the end of an 11-year solar cycle so the show should be exceptionally beautiful.

Predicting the activity level of a solar cycle is very important for many reasons.

That has led some observers to suggest the solar cycle hit bottom last year.

This current solar cycle bringing increased activity won’t peak until mid-2013.

The solar cycle is gaining strength with a maximum expected in 2013.

As a result, the solar cycle is extremely influential on the climate.

On the inner circle, the hand indicates the current year of the solar cycle.

The prediction is specifically aimed at the solar cycle starting in 2020.

This is a regular part of the solar cycle.

But he disagreed with the model's prediction that the next solar cycle would start later than expected.