Cosmological constant

Cosmological constants (also known as physical or universal constants) are observed and measured values for naturally occurring phenomena. These include, but are not limited to:
 * c, the speed of light in a vacuum
 * G, the gravitational constant
 * &#x210F;, Planck's constant
 * e, the elementary charge
 * ε0, the permittivity of free space

Arguments

 * Fine tuning argument