That’s in part because most of them may not be capable of such travel time just yet. According to a new study published this week, at least four alien civilizations (possibly even hostile) allegedly lurk in the shadows of the Milky Way.
Editors Cliffnote: for space reference according to what we could find on the internet planet earth is roughly 26,000 light years itself from the galaxy which would mean we earthlings would have to transverse much of the observable universe to get there.
“This paper attempts to provide an estimation of the prevalence of hostile extraterrestrial civilizations through an extrapolation of the probability that we, as the human civilization, would attack or invade an inhabited exoplanet,” Caballero wrote in the study.