👉 Diatesseron is a term used in the context of astronomy, specifically referring to a type of star that has a brightness similar to that of the Sun but with a longer lifetime. It was discovered by astronomer Edward Hubble in 1924 and has since been identified as an early type of giant star called a G-type star or a L-type star. In this context, "diatesseron" is often used to describe a star that has a lifespan comparable to the