Solar flares and coronal mass ejections are associated with sunspots, although we're not sure which one is the cause and which the effect.
If you are interested in solar phenomena, visit www.spaceweather.com to see daily photos of the Sun.
Solar flares and coronal mass ejections are associated with sunspots, although we're not sure which one is the cause and which the effect. If you are interested in solar phenomena, visit www.spaceweather.com to see daily photos of the Sun.
SunSpots
sunspots
SunSpots
Sunspots - and the Gregorian calendar.
There does not seem to be a famous person who is named Les Ridden. The words Les Ridden are often associated with mountain biking events but not with a person.
The most discernable features on the Sun are sunspots; areas that are a little cooler, and therefore a little darker, than the rest of the Sun around them. We know that sunspots are formed by intense magnetic regions, and that large solar flares and prominences are associated with sunspots. There's a cycle of increasing and decreasing numbers of sunspots that runs about 11 years in length, although this can vary by a couple of years. Slower cycles seem to be correlated with fewer sunspots, and faster cycles with more sunspots, but scientists don't have a detailed explanation for why the cycle exists, or why it is 11 years (more or less) in length. We are currently (in 2014) at or near the maximum of the sunspot cycle. You can see the daily view of the Sun and yesterday's sunspot number at the SpaceWeather website, www.spaceweather.com.
The most discernable features on the Sun are sunspots; areas that are a little cooler, and therefore a little darker, than the rest of the Sun around them. We know that sunspots are formed by intense magnetic regions, and that large solar flares and prominences are associated with sunspots. There's a cycle of increasing and decreasing numbers of sunspots that runs about 11 years in length, although this can vary by a couple of years. Slower cycles seem to be correlated with fewer sunspots, and faster cycles with more sunspots, but scientists don't have a detailed explanation for why the cycle exists, or why it is 11 years (more or less) in length. We are currently (in 2014) at or near the maximum of the sunspot cycle. You can see the daily view of the Sun and yesterday's sunspot number at the SpaceWeather website, www.spaceweather.com.
Sunspots are dark because they are cooler than the surrounding area on the Sun's surface, known as the photosphere. The magnetic fields near sunspots inhibit the flow of hot gases from below, causing them to be cooler and appear darker in comparison.
Sunspots. Do not look at the sun directly. You will be blinded. Answer 2: They are called Sun's dark spots. The new study reports that Sun's dark spots seem to form when uranium fission lifts away a large chunk of Sun's core material along with fission fragments into nuclear fallout. A large crater formed at the site of fission appears as Sun's dark spot since no emission takes place from the site, while the remaining Sun's disk show very low intensity at Bharat Radiation, UV and visible light wavelengths.
It doesn't seem to be associated with cancers of any type.
Yes. This is called sunspot extrapolation. For the past 400 years, scientists have been observing the sunspot populations. They have found a variety of qualitative (non-numerical) and quantitative (numerical) data and have concluded that the number of sunspots peaks and falls at a cycle of approximately 11 years.