cycle of activity in a sentence

The Taurid stream has a cycle of activity that peaks roughly every 2500 to 3000 years, when the core of the stream passes nearer to Earth and produces more intense showers.
And with the sun so close to another solar maximum _ the peak of its 11-year cycle of activity _ fans of the aurora and of high technology alike are anticipating some fireworks.
That is the conclusion of Jeffrey C . Hall of Brandeis University and other researchers who have discovered that the flies can reset their circadian clocks, their daily cycles of activity, based on smell.
With the sun at the height of its 11-year cycle of activity, scientists were able to investigate why the corona reaches 3.6 million degrees Fahrenheit ( 2 million Celsius ), despite the bitter cold of space.
It was an unexpected event, because the sun is known to go through an 11-year cycle of activity, and this year is actually seeing the end of the most active period, known as " solar maximum ."

With the sun at the height of its 11-year cycle of activity, scientists were able to investigate why the corona reaches 3 . 6 million degrees Fahrenheit ( 2 million Celsius ), despite the bitter cold of space.
With the sun at the height of its 11-year cycle of activity, this is a good chance to investigate why the corona sizzles at 3.6 million degrees Fahrenheit ( 2 million Celsius ), despite the bitter cold of space.
With the sun at the height of its 11-year cycle of activity, this is also a good chance to investigate why the corona sizzles at 3.6 million degrees Fahrenheit ( 2 million Celsius ), despite the bitter cold of space.
With the sun at the height of its 11-year cycle of activity, this is a good chance to investigate why the corona sizzles at 3 . 6 million degrees Fahrenheit ( 2 million Celsius ), despite the bitter cold of space.
The eruption began shortly after dawn and was part of a cycle of activity that has occurred roughly every six months since the 5, 016-meter ( 16, 553-foot ) Tungurahua rumbled back to life in late 1999 after decades of inactivity.

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