The ninth planet of the solar system was discovered not long ago. It happened in 1930. Scientists had been hunting for the planet for a long time. They had calculated its probable position, but there was no proof that the planet really existed. It was too far away for the telescopes of that time to find it. It’s worth mentioning that the first photos of the planet were taken by a very young researcher. He was only twenty-four and had no formal education in astronomy. However he was deeply involved in the search for the ninth planet. The planet at the edge of the solar system was called Pluto, after the Roman god. The name for the planet was suggested by an 11-year-old British girl.