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Babak Tafreshi

3/4/2012 4:14:25 AM

 

Greetings Peggyla: definitely these colors won't be visible to human unaided eyes. Our eyes are not sensitive enough to colors of faint source of lights. However these colors exits in the lights from the night sky. The red emission Carina Nebula is bright at H-Alpha emission line which is in the far red part of the visible spectrum. Being low on the horizon added indeed a red cast to the sky background of this image, as well the camera was a modified DSLR, while regular DSLRs block most of the red light of these emission nebulae.

 

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Peggyla

2/18/2012 12:53:05 PM

 

I have been following APOD for years, and the most confusing thing to me are colors. When am I looking at real colors, and when is the photograph 'colorized' to indicate different gasses? Sometimes they tell you but not always. I am fascinated with the idea of colors in space, so I always want to know. In this case, I am so curious to know if I was standing at that spot, would I really see that much red, and also, is any of that red due to sunrise or sunset, or the nebula rising at that time of night, therefore low on the horizon and being seen through more earth atmosphere? Or, did the camera lens have a red filter? Would love an answer.

 

Email: plamendola@brwilson.com

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Steno Ferluga

2/18/2012 1:27:27 AM

 

A milestone in astrophotography

 

Email: stenoferluga@hotmail,com

Website: http://www.ferluga.net

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hamidreza barari

1/29/2012 6:35:24 AM

 

great shot...congrats

 

Email: itworld2010@gmail.com

Website: http://hamidshots.blogspot.com

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Amirreza Kamkar

1/26/2012 2:58:21 AM

 

it's great.could you tell the exposure?

 

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