- In astronomy, the main sequence is a classification of stars which appear on plots of stellar color versus brightness as a continuous and distinctive band. Stars on this band are known as main-sequence stars or dwarf stars, and positions of stars on and off the band are believed to indicate their physical properties, as well as their progress through several types of star life-cycles. These are the most numerous true stars in the universe and include the Sun. Color-magnitude plots are known as Hertzsprung–Russell diagrams after Ejnar Hertzsprung and Henry Norris Russell.
- Absurdist fiction (Wikipedia)
Absurdist fiction is a genre of novels, plays, poems, films, or other media that focuses on the experiences of characters in situations where they cannot find any inherent purpose in life, most often represented by ultimately meaningless actions and events that call into question the certainty of existential concepts such as truth or value. In some cases, it may overlap with literary nonsense.