В 1930 г. открыта планета Плутон

If a scientist first assumes that there is an island or planet somewhere and confirms his assumption with calculations, it is common to speak about a discovery made with the point of a pen. However, the way from pen point to actual discovery may take long. Famous American astronomer Percival Lowell failed to live to the discovery of the planet that he had predicted in 1915. Only 15 years later Clyde Tombaugh from the Lowell Observatory discovered the ninth planet. Atlas, Prometheus, Chaos, Athena, Hera, Hercules, Erebus, Zeus – these were the names suggested for the new planet. Finally, name Pluto was chosen, as its first letters dovetailed with initials of the discoverer. Though the status of planet was assigned to Pluto in the same 1930, some members of astronomical community said from time to time that it was actually not a planet, as confusion of terms had taken place. The critics finally managed to carry their point: in 2006, the International Astronomical Union (IAU) deleted Pluto from the list of planets. In order not to disappoint the conservatives and astrologists who cannot do without Pluto, a new category – dwarf planets – as introduced, and this very status as assigned to Pluto. The same decision was taken with regards to asteroid Ceres. The American Dialect Society (ADS) was quick to respond to this decision having officially recognized verb to pluto meaning reducing to a lower rank or value. Once words are marked down on paper, they cannot be taken back.