- Stingray Nebula (Wikipedia)
The Stingray Nebula (Hen 3-1357) is the youngest-known planetary nebula, having appeared in the 1980s. The nebula is located in the direction of the southern constellation Ara (the Altar), and is located 18,000 light-years (5,600 parsecs) away. Although it is some 130 times the size of the Solar System, the Stingray Nebula is only about one tenth the size of most other known planetary nebulae. The central star of the nebula is the fast-evolving star SAO 244567. Until the early 1970s, it was observed on Earth as a preplanetary nebula in which the gas had not yet become hot and ionized.
- Alula Borealis (stars.astro.illinois.edu)
ALULA BOREALIS (Nu Ursae Majoris). Leaping across the sky south of Ursa Major’s Big Dipper bounds the Arabic gazelle, marked by three unrelated pairs of stars, the First-Leap Alulas (Borealis and Australis, respectively Nu and Xi), the Second Leap Tanias (Borealis and Australis, Lambda and Mu), and the Third Leap made of Talitha (to the north) and Kappa (to the south).
