**Equation #1 The Hubble’s Law**

Everything in the universe appears to be moving away from each other on the cosmic scale. The larger the separation between two objects, faster is their receding velocity(measured by redshift).

For more details, go see http://hyperphysics.phy-astr.gsu.edu/hbase/astro/hubble.html

For more equations, see Famous Equations in Physics

Hubble’s Law