The UO Campus
NGC 7023:
a reflection nebula
Context:
Where is it?
What's happening around there?
Our Galaxy of Gas
The Origin of H
Images of HI
Images of CO
Molecular Density > Atomic Density
Images of Dust
What is the history of 7023?
How old is the star?
Photodissociation
or
Outflow?
Conclusions
