Re: [APML] Astronomy Magazine M8

[Dean Ketelsen <ketelsen@as.arizona.edu>]

>	Thanks for the link.  This is very interesting. M8 looks so blue
>and purple and I find it difficult to believe that all our red images are
>that far off.  There must be a reasonable explanation for this.

I think the key words here is that he was approximating a visual image.
As we all (may) know, the response of the dark-adapted eye shifts towards
the blue, and in fact, from my spectroscopic imaging of planetaries with
strong H-alpha, the eye is dead sensitivity-wise at 650nm.  It makes sense
then that any approximation to a visual image would be rather blue.

I neglected to mention that there were several M8 images in their gallery
as someone pointed out.  It is access thru the gallery link at their main
site of www.noao.edu.

Sorry for the late response - you guys stay up way past my bedtime!

					-Dean

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