Why would the sky glow red? An aurora! A solar storm in 2012, mostly coming from an active sunspot, showered particles on the Earth that excited oxygen atoms high in the Earth’s atmosphere. As the excited element’s electrons fell back to their ground state, they emitted a red glow.
The sky that night, however, also glowed with more familiar but more distant objects, including the central disk of our Milky Way Galaxy on the left, and the neighboring Large and Small Magellanic Cloud galaxies on the right.
Image Credit & Copyright: Alex Cherney (Terrastro, TWAN)
Here’s the labelled image for anyone who is interested: