How many are there? Where are they from? We do not know, but some believe there are many. The website biblotecapleydes.net provides an extensive list (more than 50 in number), but I do not know how accurate this is. They are not angels nor demons. They are like us, with strengths and weaknesses. It is understood the number of negative extra-terrestrials is small compared to the vast number of positive extra-terrestrials.
Airspacemag.com reports on recent discoveries and calculations of Frank and Sullivan, who assume that one-fifth of all stars have habitable planets orbiting them. They calculate the odds that Earth is the only planet to have advanced civilisation in our Milky Way galaxy, which is 1 in 60 billion. This staggering statistic suggests that it’s very likely that other intelligent, technologically advanced species evolved elsewhere. Even if only one in every million stars hosts a technologically advanced species today, that would still yield a total of about 300,000 such civilisations in the whole galaxy. The vastness of the universe is truly awe-inspiring.
Additionally, the Drake Equation, developed by astrophysicist Dr. Frank Drake, offers a framework for estimating the number of active, communicative extra-terrestrial civilizations in the Milky Way galaxy. The equation takes into account factors such as the rate of star formation, the fraction of stars with planetary systems, and the number of planets that could potentially support life. The vastness of the Milky Way, with its estimated 100 billion stars, suggests the potential for a significant number of advanced civilizations.
It would be a mistake to believe that these other civilizations would have a level of technology similar to ours. Instead, it is likely that most are tens of thousands of years ahead of us, given the potential for civilizations to have evolved over much longer periods of time.