»In which we discover the prettiest star

I free-associated while reading about a particular sort of star (informally known as "splat" or "asterisk", I guess), and thought about different kinds of non-celestial stars. The candidates:

Wandering Star, the haunting post-modern torch song by Portishead.

The Prettiest Star, the lush single David Bowie released in 1970 at the apex of the glam racket.

Kleene Star, which is an operation on a set of strings that produces the set of component strings, including the empty string. The motto "Kleeneliness is next to Gödeliness" made me chuckle.

I discovered Planet Math while looking for information about the Kleene Star, and find the wiki-based collaborative maths encyclopædia quite compelling.