- Riemann zeta function (Wikipedia)
The Riemann zeta function or Euler–Riemann zeta function, denoted by the Greek letter ζ (zeta), is a mathematical function of a complex variable
- Rasalhague (stars.astro.illinois.edu)
RASALHAGUE (Alpha Ophiuchi). Not far from a star with a similar sounding name, Rasalgethi in Hercules, second magnitude (2.08) Rasalhague is the luminary of the relatively dim but very large and intriguing constellation Ophiuchus, the Serpent Bearer.
