Not-so-quiet Sunday

R

ricklbert

UHF JUNKIE
Not-so-quiet Sunday
Saturday, April 25, 2009

The sun produced an unexpected burst of activity on April 23rd when an enormous Prominence rose on the northeastern limb and erupted. SOHO recorded the blast from beginning to end with a series of high-Cadence UV snapshots.

prom_strip.jpg


The complex explosion produced not one but two billion-ton coronal mass ejection (CMEs) movie.

An impact from such a double-CME would almost surely spark magnetic storms around the poles of Earth, but it is not heading in our direction. The chance of auroras remains low.

Ga to SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids & auroras to-movie-viewing.

Translated version of http://www.star-people.nl/index.php?module=news&id=151
 
R

ricklbert

UHF JUNKIE
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New mini-ice age by lazy Sunday?
Friday, April 24, 2009

Despite the bright spring weather, the sun in 100 years has never been so 'lazy' been. The big fireball currently has remarkably little sunspot, which is a sign of activity. "This is a very exceptional phenomenon unseen since early 1900." A long period of low solar activity can lead to cooler summers and more rigorous winters. International researchers to predict even a 'mini-ice age'.

Who these days with a telescope to the top tail - of course, solar filter - will undoubtedly note, the sun is in its element and it has everything to do with her cycle. "The solar cycle is an average period of eleven years in which the sun is not a lot of sunspots," said astronomy professor Christoffel Waelkens of the KU Leuven.

The new cycle - the 24th since the beginning of the measurements - was officially launched in early January 2008. "During the early days of a cycle, called solar minimum, we get to the general lack of sunspots visible. But the current minimum lasts almost a half year, which is not normal."

According to the Royal Observatory of Belgium were the solar cycle is only 20 'sunspot groups' observed, "and last year we had 266 days without spots. It is the beginning of 1900 since the sun was so calm," says Guido Gubbels Planetarium of the Euro in Genk. By comparison, a normal solar cycle is 40 000 to 50 000 sunspots.

Sunspots are brown or black spots that the activity of the sun appear. A new cycle starts when a stain is seen around the equator of the sun, and the magnetic field reverses after eleven years. Science affected in the dark about the 'disappearance' of the sunspot. "During such a cycle are processes which we know the circumstances is insufficient", says the.

The question that Russian and Bulgarian astronomers now ask is whether there is not something with the sun going on and if we do not see a Maunder Minimum, which is in the second half of the 17th century events. Since half a century no sunspots were observed, caused a small ice age. The Flemish experts do not agree. "It is impossible to predict whether we go back to a period, for the same money, the Sunday following week running," reads the.

While no one on an ice age is waiting, this takes a positive impact on global warming, as also Waelkens again. "But then it offers only temporary relief. It can be a poisoned gift, because if the sun as' excuse 'to go en masse to emit CO2, we guarantee the lid on the nose."

The current prediction is that the solar maximum - the most spots to be seen - will take place around 2014.


Source: desterren.net

Translated version of http://www.desterren.net/nieuws/1004/de-zon-is-lui/
 
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