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Dark spots, some as large as 50,000 miles in diameter, move across the surface of the sun, contracting and expanding as they go. These strange and powerful phenomena are known as sunspots.
Sunspots are dark, planet-sized regions that appear on the "surface" of the Sun. They may look small, but they are actually as big as a planet like Earth or Mars!
Sunspots are "dark" because they are colder than the areas around them. Of course, they are not really cold like we think of cold! A large sunspot might have a temperature of about 3,700° C or 6,700° F!
A large sunspot might have a temperature of about 4,000 K (about 3,700° C or 6,700° F). This is much lower than the 5,800 K (about 5,500° C or 10,000° F) temperature of the bright photosphere that surrounds the sunspots.
Sunspots can last for weeks or even months. The number of spots on the face of the Sun is not always the same, but goes up and down in a cycle. Over time, astronomers have used different instruments to look at how many sunspots are on the Sun, but remember that you should NEVER LOOK directly at the Sun!
Sunspots are only dark in contrast to the bright face of the Sun. If you could cut an average sunspot out of the Sun and place it in the night sky, it would be about as bright as a full moon. Sunspots have a lighter outer section called the penumbra, and a darker middle region named the umbra.
Areas around sunspots called active regions on the Sun can lead to solar flares and Coronal Mass Ejections (CMEs for short). The solar activity of flares and CMEs are called "solar storms".
Sunspots are caused by the Sun's magnetic field welling up to the photosphere, the Sun's visible "surface". The powerful magnetic fields around sunspots produce active regions on the Sun, which often lead to solar flares and Coronal Mass Ejections (CMEs). The solar activity of flares and CMEs are called "solar storms".
Sunspots form over periods lasting from days to weeks, and can last for weeks or even months. The average number of spots that can be seen on the face of the Sun is not always the same, but goes up and down in a cycle. Historical records of sunspot counts show that this sunspot cycle has an average period of about eleven years.
Our Sun isn't the only star with spots. Just recently, astronomers have been able to detect "starspots" - "sunspots" on other stars.
wallhalla15, ralfsworld, jcoowanitwong, dew77, red45, saguzar, egeerhan, ayk55, ecem35 ha puntuado esta nota como útil.
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- [2006-08-18 4:21]
Così semplice, così splendida, sempre da ammirare!
this is a great photo. Great colours, excellent sharpness and POV. This is a very nice composition. I like it very much. TFS.
Just wonder how did you take this picture. A perfect sun to me. TFS
What a great idea! This is very well done with interesting notes. TFS,
- [2006-08-30 5:03]
Very nice capture.I liked warm colors,sharpness,your
informative note and composition a lot.
- [2006-09-02 17:35]
Fantastic capture. It is very difficult to photograph sunspots without professional equipement and you did it excellent. This is also very arty sunset, one of best on TN. Congratulations!
It´s not usual to see dark spots photos in TN, and this is very good. The sun has portraited in agood size without telescope.
Beautiful degradee tones and well centered, as usualy prefered people who love astronomy shots.
Cok ilginc bir fotograf, renkler ve netlik cok basarili, tebrikler.
- [2006-11-10 13:31]
eline sağlık dikkatli ve araştırmacı arkadaşım.o))))
- [2006-11-11 16:50]
Çok güzel ve ilginç bir görüntü olmuş.Tebrik ederim
Interesting presentation with well researched notes!