- James Madison (allthetropes.org)
James Madison was one of the Founding Fathers. He presided over the War of 1812, wherein much of Washington D.C. was burnt down; fortunately for him this happened after he had already been elected to a second term. Many things were named after him, including New York City’s Madison Square Garden. Also, there are brands of ice cream and snack cakes named after his wife, Dolley (a famous hostess).
- Main sequence (Wikipedia)
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.