Corvus Eye Observatory, Athens & Syros, Greece: Solar Activity on 03/12/2011

Our Srar

Our Star
Its image is mesmerizing - out of this world - through a solar telescope...
A star full of life, willing to talk to you, sometimes through its carefree fairies (prominences), dancing at the disk limbs or its black halos (sun spots) and serpentine figures (filaments), crawling on its surface making any observer gazing at them in awe...

A fascinating spectacle changing every day without repeating the magic of the previous day...
This is what makes it a unique, worth observing celestial object by amateur and professional astronomers alike....

Thank you for visiting my Blog
Peter Desypris

Hydrogen-alpha & White Light Solar imaging

Sunday, December 4, 2011

Solar Activity on 03/12/2011

Between 10:30 and 11:30 UT, observers in Europe watched tendrils of hot plasma rocket away from the sun's NW limb.
The Picture on the left shows the hot plasma as prominence, two hours early.

North-Western limb
AR11361 & 11358 are visible

AR11365-11362-11363

LUNT LS60THa with B1200
Barlow 2X CEMAX & Neodymium Sky Glow Filter
DMK31AU03.AS

Lucam Recorder-Registax 6-Photoshop CS4

03 December, 2011
Athens,Greece

                              Eastern Limb
                             AR11366 & 11364

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OUR STAR....

The star around which the Earth revolves, and the gravitational center of the Solar System; it lies about 270,000 times closer to us than the next nearest star. The Sun is a solitary, yellow dwarf star of spectral type G2 (see G star) that has been on the main sequence for about 4.6 billion years.

The Sun consists largely of hydrogen (71% by mass) and helium (27%), with much smaller amounts of heavier elements. It puts out 400 trillion trillion watts of energy, produced by the fusion of hydrogen to helium by the carbon-nitrogen cycle in its core. The Sun is 109 times wider than the Earth. It spins on its axis with a period that varies from 25 days at the equator to 33.5 days near the poles.

The visible surface, or photosphere, is surrounded by the chromosphere and, beyond this, the corona.

distance	149,597,900 km (92,975,699 mi., 8.3 light-minutes)
spectral type	G2V
diameter	1,392,000 km (865,000 mi.)
surface temperature	5,400ºC (9,800ºF)
central temperature	14 million ºC (25 million ºF)
mass (Earth = 1)	332,946
density (water = 1)	1.409
surface gravity (Earth =1 )	27.90
escape velocity	617.5 km/s (383.8 mi./s)
rotation period	25.38 days
apparent magnitude	-26.8
absolute magnitude	4.83