Giuseppe Piazza discovered in the end of the year night 1800/1801, in the space between Mars and Jupiter, the first small planet baptized with the name of Ceres. Numerous small planets (asteroids, planetoids) were discovered below.
The parallaxes of the outer and inner planets were made during the transits and later the parallaxes of the first stars were made as was 61 of the Swan by Fiedrich Bessel in the year of 1838, resulting in a distance of 11 light years. Then Alfa Centauro was studied from the southern hemisphere, with a distance of 4.3 light years. In this way the size of the universe extended to infinity.
Astronomers' interest in comets and the calculation of their orbits increases with the return, among others, of Halley's famous comet and in 1835. Schiaparelli, in Milan, discovers the connection between meteorological swarms and comets. Thus, they advance step by step the understanding of our planetary system and the fixed stars.
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