Light Speaks to Us. 1

Many amateur astrophotographers use narrowband filters dedicated to capturing the emissions around specific wavelengths of the electromagnetic spectrum to enhance the appearance of their images of the sky. It must be noted that these filters primarily reveal certain emission properties of the chemical elements they isolate. For example, by using these filters, we can learn about the properties of abundance, distribution, and intensity, maybe even of the variability and evolution of these emission lines in these nebulae. Since not all celestial objects have the physical properties necessary to display these emission lines, it may sometimes be useless or even ineffective to use such filters. However, these filters are very interesting for certain kinds of "detective work," such as that presented in this document.