I digress so lets get on to the photography of this image.
How do you go about photographing the Milky Way? The first thing you need to do is find a very dark sky location, where there is no adjacent light pollution. For the US, this typically means being in a western state in a very remote location. Secondly, you have to be out in this remote location at ~3am during springtime months to see the Milky Way in its arched formation. Lastly, even with a wide lens such as 16mm, you have to take several images (14 images in my case), and then stitch them together to make one composite image, if you want to see the whole arch in your photo. (By the way, in case you’re wondering, that is my silhouette you see under the arch). Now, it that is too late for you to stay out, you can always try capturing some start trails. The interesting thing about stars is that each star has a different heat signature and hence a different color. This is similar to different colors you see when looking at a fire. However, if you use one long exposure, your camera sensor will become saturated and your star trails will come out white. To retain the color, you need to take shorter exposures at a lower iso.