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Old 21-09-2008, 03:52 AM
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Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
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Quote:
Originally Posted by avandonk View Post
..... It should be a very lipstick red if anything as it is far down the spectrum to what humans perceive as red.

Bert
As Bert suggests, H-alpha is deep red. Just look at the sun with a H-alpha solar filter
...which passes *only* H-alpha light to sub-angstrom precision...

The perceived colour is unmistakable. H-alpha emissions from nebulae are *exactly* the same colour....just a lot less bright.

A nebula however may have more than one emission (eg H-Beta) which will may give it a more magenta hue.

But as for the colour of H-Alpha, I would not have thought there is any debate.
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