- Orion (Ὠρίων in Greek) is the most splendid of constellations, befitting a character who was in legend the tallest and most handsome of men. His right shoulder and left foot are marked by the brilliant stars Betelgeuse and Rigel, with a distinctive line of three stars forming his belt. ‘No other constellation more accurately represents the figure of a man’, says Germanicus Caesar.
- Leonhard Euler (Wikipedia)
Leonhard Euler (/ˈɔɪlər/ OY-lər, German: [ˈleːɔnhaʁt ˈʔɔʏlɐ], Swiss Standard German: [ˈleːɔnhart ˈɔʏlər]; 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician, and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory.