- Rincewind is a fictional character appearing in several of the Discworld novels by Terry Pratchett. He is a failed student at the Unseen University for wizards in Ankh-Morpork, and is often described by scholars as “the magical equivalent to the number zero”. He spends most of his time running away from bands of people who want to kill him for various reasons. The fact that he’s still alive and running is explained in that, although he was born with a wizard’s spirit, he has the body of a long-distance sprinter. Rincewind is also renowned for being able to solve minor problems by turning them into major disasters. His unique “skill” is implied to be due to being the chosen one of “The Lady”, the anthropomorphic personification of luck (both good and bad).
- Binary star (Wikipedia)
A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separate stars, in which case they are called visual binaries. Many visual binaries have long orbital periods of several centuries or millennia and therefore have orbits which are uncertain or poorly known. They may also be detected by indirect techniques, such as spectroscopy (spectroscopic binaries) or astrometry (astrometric binaries). If a binary star happens to orbit in a plane along our line of sight, its components will eclipse and transit each other; these pairs are called eclipsing binaries, or, together with other binaries that change brightness as they orbit, photometric binaries.