The Drake equation strives to estimate the number of dynamic and intelligent life forms in the Milky Way galaxy by examining the probability of any communication from outer space. It is also the topic that tries to find the number of extraterrestrial civilizations in the alien world. Trying to respond to the mystery of intelligent life in the vast universe, the equation consists of many variables. These variables are explained below.

**N = R * • f**_{p}**• n**_{and}**• f**_{l}**• f**_{i}**• f**_{c}**• L**

**N** = is the quantity of dynamic civilizations in the cosmic Milky Way system with perceptible electromagnetic discharges.

**R *** = consider the speed with which the stars are modeled which are appropriate for the presence of intelligent life

**f**** _{p}**= this variable increases the probability that these stars can have a planetary system

**n**** _{e}**= this is the quantity of planets that have an appropriate domain to help life, by close planetary group

**f**_{l}= is the portion of reasonable planets in which life can appear

**f**** _{i}**= is the fraction of living planets on which advanced civilizations can intelligently exist

**f**** _{c}**= the fraction of intelligent life and civilization that has developed a technology that can be detected in space to alert them to their existence

**L** = the length of the period from which this intelligent civilization can release radial signals detectable in space

Origin of the Drake equation

The Drake equation is named after Dr. Frank Drake who invented the equation in 1961. It was an approach to fortify a scientific discussion between the research meeting for extraterrestrial intelligence (SETI). While working as a radio space expert for the National Radio Astronomy Observatory in West Virginia, he considered ascertaining the amount of civilization in the Milky Way galaxy. To accurately determine the likelihood of different developments in space, Dr. Drake distinguished particular factors that were crucial to the presence of a discerning life. These particular variables incorporate the disposition rate of the stars that sustain life, the probability of planetary celestial bodies and the radial signs perceptible from space.

Criticism of the Drake Eqation

The Drake equation has been criticized for a number of reasons, such as speculation on some of the variables and terms of the equation. Furthermore, the limitations of our understanding of the evolution of life on other planets, civilization and intelligence reduce the accuracy of establishing extraterrestrial civilizations in space. Some parameters of the equation are difficult to estimate and this could create a huge margin of error.

However, the original purpose of the equation was to encourage a discussion on topics of extraterrestrial civilizations and not necessarily determine the precise numbers. In this regard, the equation is still useful in examining the specific factors that can support life on other planets. Most parameters are still relevant and tell us more about what we need to learn to one day discover the existence of an intelligent life on other planets.