1st Drake: The Stellar Numerosity of the Galactic Disk for K, G and F Spectral Class Stars
摘要
Let’s start with the 1st Drake parameter, the stellar numerosity of the galaxy, but also assign to the first parameter the scope of considering only the stars today deemed suitable for the development of life, namely those of spectral class K, G and F of the galactic disk [26] (Fig. 3.1).