Drake Equation

The Drake Equation is a probability (possibility) measurement of the existence of extraterrestrial life

• formulated in 1961 by Dr. Frank Drake
• {\displaystyle N=R_{*}\cdot f_{\mathrm {p} }\cdot n_{\mathrm {e} }\cdot f_{\mathrm {l} }\cdot f_{\mathrm {i} }\cdot f_{\mathrm {c} }\cdot L}