Free Astronomy Magazine November-December 2021

24 ASTRO PUBLISHING NOVEMBER-DECEMBER 2021 turies if not millennia, making the scripts unsustainable. Unlike other TV series, the exceeding of that limit in UFO is not abused, and it is suggested that the planet is still rel- atively close to our solar system, so much so that, as we will see later, the authors could also have done without resorting to that trick. If it had not been deemed necessary to make aliens travel at superluminal speeds, the UFO plot would appear surprisingly credible today, since al- most everything else is not a priori impossible.