NGC 6543 The Cat's Eye Nebula

Located in the northern constellation of Draco, NGC 6543, commonly known as the Cat’s Eye Nebula, is one of the most structurally intricate planetary nebulae known. Discovered by William Herschel in 1786, it gained particular scientific importance in 1864 when William Huggins used spectroscopy to demonstrate that such objects are composed of glowing gases...Read more

A Strange Spiral in the Àger sky: Update March 2026

Almost one year after the first event documented on this page, a very similar phenomenon appeared again in the night sky and was recorded from my observatory in Àger. During the night of 12 March 2026, my monitoring camera captured the full passage of another luminous spiral slowly expanding across the sky ...Read more