See the Orion 3D flythrough Here.

Since I made the new image of Orion my wallpaper I have found myself just starring at it and wondering a variety of things:

1) Where are the supernovae cores that produced all the dust?
2) How many type Ia or II?
3) Is our system just passing by on our orbit around the galaxy or are we travelling together?
4) How much dust? I am going to work on this one because I bet there are some estimates out there.
5) What are the relative motions of the new stars and the dust winds that have been measured?

I am also sure that there is an entire industry of astronomers investigating these things as their life work. I am always amazed of the amount of wonder one image can evoke.

Edited to add: How does Dark Matter play in the nebulae?