- A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
- Andrew Bayer (Wikipedia)
Andrew Michael Bayer (born 1987) is an American DJ and Grammy-nominated music producer. He is best known for working with Anjunabeats as a multi-genre artist and English deep house sublabel Anjunadeep.
- Ring Nebula (Wikipedia)
The Ring Nebula (also catalogued as Messier 57, M57 and NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space.