He lived in a village near present-day Liverpool, and his colleague William Crabtree lived near Manchester. The latter subsequently was killed in the Civil War. The group that formed around them were Britain's first Keplarians, 'nos Keplari' as they called themselves, and were distinguished as being the first people to gain a realistic notion of the solar system's size. Thereby, a huge size of the solar system was implied.
Solar parallax is the angle which the radius of the Earth makes, as seen from the Sun.
Size of the Solar System Kepler's solar system was about seven times too small, though his lunar distance was more or less correct. His third law concerned the proportional distances of the planets, not their actual distances. The north-country group of astronomers came to appreciate the real dimensions of the solar system. After his death, Horrock's books on astronomy in his library were found to be all from abroad, as there were no British books on the subject. Details of his life are indeed scant, but Chapman has conjectured that Horrocks may have been a schoolmaster, who intended to become ordained when old enough.