Process of ‘shifting’ and Id-ing the ‘new’ galaxy led me to ignore my conclusion for Galaxy F. I don’t understand how (-18) is answer and not (-2)?? Why is it different? But I had 9 correct letters, so I substituted. I can live with this anomaly🤨
Great puzzle! I noticed that the lay-out of each galaxy label was unique in its horizontal positioning and I wish that the answer required us to sort the shifted letters by the each galaxy's relative position (i.e. a nod to the light spectrum) rather than just reading the letters top-to-bottom but it was fun to learn about light and the Doppler effect!