Faint background dust, and light pollution (CLS CCD) filters.....

[stan26]

Hello guys, I have often wondered but never found the answer....

The faint background browny reddish dusty stuff you get around a lot of DSO's, in terms of photons and capturing it what actually is it..? i.e is it emission or reflection dust..? or neither..?  How does it appear in some of my images, obviously it is sending light to our sensors but how..?

The reason I make the effort to ask on here is, I'm considering the Astronomik CLS CCD filter to help capture the fainter stuff from my moderately light polluted back garden, however if a lot of the faint dusty stuff is reflected light I guess its not going to help me much given is pass bands...? For example I would like to capture the faint brown stuff around orion, but will a CLS filter help or hinder..?

Any thoughts?

Stan

[Stargazer_00]

It could be both?  Emission dust, I believe, obscures a point source of light but over time heats up and then begins to emit that same light again.  Reflection dust simply reflects the light rather than absorbing it, id guess the light source is between us and this dust.  I depends what it's made of, it isn't dust like here on earth where it's 90% human skin.   In space I'd expect it's just carbon based molecules that never accreted into planets and all the other elements up to iron.