Discovery and exploration of the Solar System Domenico Cassini later discovered four more moons of Saturn and the Cassini division in Saturn's rings. Edmond Halley realised in 1705 that repeated sightings of a comet were recording the same object, returning regularly once every 75–76 years. This was the first evidence that anything other than the planets orbited the Sun. Around this time (1704), the term "Solar System" first appeared in English. In 1781, William Herschel was looking for binary stars in the constellation of Taurus when he observed what he thought was a new comet. Its orbit revealed that it was a new planet, Uranus, the first
Devil's Planet Devil's Planet "Devil's Planet" is the twenty-second episode of the second series of the British sci-fi television series "" (and the forty-sixth overall episode of the programme). The screenplay was written by Michael Winder; the director was Tom Clegg. The original title of the episode was "Devil's Moon". The final shooting script is dated 9 September 1976 and live-action filming began on Monday 1 November 1976 lasting through to Thursday 18 November 1976. The episode was first broadcast in the U.K. on 1 September 1977. 2306 days after leaving Earth orbit, the Moon is passing a solar system containing a