Every day our eyes catch the light of our memories – time spent with family, the journey to work, a special holiday, a beautiful sunset or a dark starlit night. Each image captured is a picture drawn in light – a photograph: only to be lost in our minds or forever forgotten. Nearly two hundred years ago a small group of amateur scientists achieved what had eluded mankind for centuries – the ability to capture a permanent record of an image seen by their own eyes – a moment in time frozen onto a surface. They had discovered Photography. They were the ‘Catchers of the Light’.

Monday, July 13, 2009

M27 , the Dumbbell Nebula in Hydrogen Alpha Light


68% of full resolution

Full resolution

EQ6,FLT110,ST10XME Ha 5nm 8,5 hours exposure.
The Dumbbell Nebula (also known as Messier 27, M 27, or NGC 6853) is a planetary nebula (PN) in the constellation Vulpecula, at a distance of about 1,360 light years.
This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes.
Τελικά κατάφερα να μαζέψω τα φωτόνια που ήθελα....με τη βοήθεια του Φεγγαριού μάζεψα λίγα παραπάνω ,αλλά τι να κάνεις αυτά έχει η ζωή...!
510 λεπτά (10x5min + 46x10min) στο 5nm Ηα της Astrodon ή 8,5 ώρες σε 4 νύχτες στη διάρκεια 2 εβδομάδων!!!
Όλη η επεξεργασία έγινε αποκλειστικά στο CCDStack με μια μικρή επέμβαση στα curves στο PS.
Αποθορυβοποίηση με 33% ΝoiseNinja
Καμία αισθητική ή άλλου είδους επέμβαση στα άστρα.
Την 1η νύχτα από λάθος η κάμερα ήταν τοποθετημένη 90 μοίρες clockwise...για αυτό και έχει γίνει crop στην κεντρική περιοχή .
Anacortes Image of the Day 07/26/2009
Enhanced by Zemanta

1 comment:

MyAstro said...

Wow, that's unfortunately one of the best pictures of M27 I have ever seen!!! Great job!