In this blog, we will discuss both how these gases turn up on our camera, and how astrophysics/spectroscopy identify and measure them. You will see that sometimes what we think we know is based on rock solid “DNA” evidence, while in many other cases, the evidence is purely circumstantial. For ease of explanation I will actually perform this task in reverse – like a mock trial – explaining what we believe the gases are and then the evidence that supports it. At the end, you may just interpret our astrophotographic images a little differently. In the vast expanse of our Milky Way, gases form the invisible backbone, shaping everything from star formation to galactic structure. They are the subject matter
Gas Expression – Visual, Photographic, and Astrophysical
