Sometime billions of years in the future, he predicts, the core and mantle could cool and solidify enough to meet the crust. If that happens, Earth will become a cold, dead planet like the moon. Long before such an occurrence, however, the Sun will likely have evolved into a red-giant star, and grown large enough to engulf our fair planet.
The term increment is occasionally used in physics and engineering to represent a small change in a parameter such as temperature, electric current, visible light intensity, or time. Also see Mathematical Symbols.
What does 'Perpetuity' mean. Perpetuity refers to an infinite amount of time. In finance, it is a constant stream of identical cash flows with no end, such as with the British-issued bonds known as consols. The concept of a perpetuity is also used in financial theory, such as in the dividend discount model (DDM). BREAKING DOWN 'Perpetuity'