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’.

Sunday, March 28, 2010


Owl Nebula was discovered in 1781 by Pierre Méchain, collaborator of Charles Messier, and it was incorporated into Messier's catalogue of diffuse objects with number 97. Although its surface brightness is quite low, it can be seen with amateur telescopes in dark nights. Large telescopes, or photographic techniques, are required in order to perceive the two cavities that justify its name. Only photographs reveal the surprising display of colours of M97.
The planetary nebula M97 is placed in the constellation of the Big Bear. It is very difficult to evaluate the distances to planetary nebulae and this case is not an exception. Thus, astronomical literature registers distances ranging from 1500 to 2500 light-years from Earth.
The central, dying star, is a small and hot object, around one hundred thousand centigrade degrees at the surface. The radiations from this white dwarf excite the atoms of the nebulous layers and make them shine. As other planetary nebulae, the shine of M97 comes mainly from the emissions from ionized hydrogen and oxygen atoms, what gives these objects their dominant reddish and greenish hues. But this object has, also, a considerable portion of light from the white dwarf that has been reflected by nebular particles. This mechanism makes its color bluer, and distinguishes this from other planetaries with a smaller reflection component.

W.O FLT-110 with dedicated field flattener
EQ6 Pro
Lum : 35min
Red : 35min
Green : 35min
Blue : 35min
5min subs
Total exposure 2h20min
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1 comment:

Ristinw said...

your photograph is really cool! i wish i could see it with my naked eyes >.<