The chapter "Discovery" has shown to us the history of some discoveries essential for our knowledge of the solar system.
Let's see some other topics :
-history of IMCCE and Bureau des longitudes
-history of the observation of solar eclipses: predictions and observations
-history of the observations of the transits of Venus in front of the Sun
-history of the observations of the Galilean satellites of Jupiter
-the names of planets and satellites: history