Corvus Eye Observatory, Athens & Syros, Greece

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

Thursday, April 14, 2011

Solar Activity on April 12 ,2011

AR11186 & 11185

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-12
ATHENS

The Sun on April 09, 2011

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
UV/IR cut Filter

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-09
ATHENS

Sunday, April 10, 2011

Solar Activity on 2011-04-08

Cloudy Sky

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-08
ATHENS

Solar Activity on 2011-04-08

Cloudy Sky

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-08
ATHENS

Wednesday, April 6, 2011

Solar Activity on 2011-04-03 ..in color

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-03
ATHENS

Sunday, April 3, 2011

Solar Activity on 2011-04-03

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-03
ATHENS

Solar Activity on 2011-04-03

LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

Lucam Recorder-Registax 6

2011-04-03
ATHENS

Friday, April 1, 2011

Images of the Sun on 2011-03-28

Images of the Sun on 2011-03-28 (A)

Cloudy conditions...
LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

2011-03-28
ATHENS

Images of the Sun on 2011-03-28 (B)

Cloudy conditions...
LUNT LS60THa/B600
LS50FHa DS
DMK31AU03.AS
Barlow 2X CEMAX & UV/IR cut Filter
on NEQ-6 PRO

2011-03-28
ATHENS

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