> Kepler's laws gave astronomers the proportions of the solar system, but not > the dimensions. By observing and timing transits such as this > simultaneously from various widely separated locations on earth astronomers > could determine the true distances between the planets. > The first triangulations of planets orbits were made by Copernicus and described in his ``De revolutionibus''. That gave proportions of the Solar System. Copernicus also tried to find dimensions of the system using ancient Greek astronomers data but because of the inaccuracy of data he received the radius of the Earth orbite about 20 times smaller.
Best regards Krzysztof Kotynia
