Our sun has a solar activity cycle of about 11 years.

Been hearing about a new ice age due to low solar activity?

How good are our records of solar activity during the periods described?

With solar activity at a maximum, more occur south of that line.

Near the solar activity maximum it can be several times further from the planet.

He expected changes in solar activity would affect climate patterns on Earth.

This distance was measured in 2007 near the solar activity minimum.

The disturbance is caused by temporary changes in solar activity.

The figures showed a definite connection between these games and solar activity.

After a period of low solar activity, the Sun's radiation is scheduled to rise again in the coming months.

When solar activity is at a minimum, more appearances occur north of the line.

Some military detection or early warning systems are also affected by solar activity.

Thus solar activity in the 21th century is expected to be lower than it was for most of the 20th century.

Unusual solar activity might lead to an increase in incident radiation.

They can be seen in lower latitudes during times of extreme solar activity.

The telescopes also measured the Sun during peak solar activity.

They seemed to be checking out some unusual solar activity."

So we're effectively invisible- their sensors would simply show solar activity while we were here.

It is theorized that this may be due to solar activity.

The mission to Mars had been timed for a period of low solar activity.

Past solar activity may be recorded by various proxies including carbon-14 and beryllium-10.

"Next year is supposed to be a good year for them, because there has been a lot of solar activity," he said.

It was lucky for him that solar activity was low.

These broadcasts are very sensitive to atmospheric conditions and solar activity.

The exposures in question come from radiation given off by the stars and sun during normal solar activity.