PHYS1160 Lecture Notes - Lecture 5: The Astrophysical Journal
Document Summary
The drake equation is a conjectural estimation of the number of advanced, extra-terrestrial civilisations in the universe with the capability for interstellar communication. It is based on seven variables which are primarily arbitrary or otherwise lacking in an exact value. (1) the equation is continually evolving and has undergone several changes since its conception. Following the final revision, the equation is as follows [figure 1]. (2, 3) Ultimately, the calculations of probabilities are heavily biased by the perspective of the scientist as the variables are subject to interpretation and can be easily over- or underestimated. This is evidenced by the drastically varying values for n, ranging from 1 to. 390 million advanced civilisations. (2) the only value that can be concluded for certain is that the occurrence of humanity indicates that the probability of intelligence developing is greater than 0. (1) Let"s have a closer look at each of the parameters.
