On the night of 5th of October a star in the sky “was switched off”. Triton, the largest of the moons of Neptune, at some 4,500 million kilometres from the Earth passed in front of the star UCAC4 410-143659, briefly occulting it. It is not at all frequent that during their “cosmic passage” around the Sun, the planets and their satellites cross the line of sight to a distant star, but the telescopes of the Canary Island Observatories, among others, were able to point to the sky just when this occultation, which lasted 145 seconds, was taking place. Its occultation was observed with diverse
