AbstractFor six decades now luminous and other unidentified aerial phenomena (UAP) have been sighted worldwide in large numbers. Extensive scientific unidentified aerial phenomena observations have been made over the last 26 years in Hessdalen, Norway. The optical properties of luminous UAPs have been described in detail, but all efforts to explain them by terrestrial causes have failed. Earlier scientific attempts to explain UAPs by extraterrestrial visitation (ETV) have failed as well. A new ETV hypothesis is proposed which aims at causally explaining all luminous UAP sightings in Hessdalen and most elsewhere. To this end a galactic neighborhood scenario and model is defined. It explains why a stealth ETV probe equipped with artificial intelligence (AI) has been built by an exo-civilization and sent in a historical past into our solar system. It states that this extraterrestrial visitation probe (ETVP), now orbiting the earth, occasionally sends a stealth electromagnetic beam (SEMB) down into the atmosphere. It explains in detail how such an SEMB produces luminous UAPs by means of a nonlinear photonic mechanism which, as such, has been known and investigated since 1995 as a branch of current femtosecond physics. This photon mechanism is further developed into a UAP-A and a UAP-B model. Together the two models explain all optical Hessdalen observations.
Keywords: UAP-UFO-extraterrestrial probe-femtosecond-laser filamentation
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