Mercury Spin-Orbit Resonance
Colombo explains Mercury's rotation as a three-to-two spin-orbit resonance, with three rotations during every two solar orbits.
Historical biography archive · Updated 2026-11-03
Giuseppe Colombo Biography and Timeline
Follow Giuseppe Colombo through 8 dated historical records for Italy.
Giuseppe Colombo, historical timeline
A chronological timeline drawn from matching World History Database records.
8Distinct records
1 of 1Page
1965–1999Years on this page
1965
1969
Mariner 10 Trajectory
Colombo develops calculations showing that a spacecraft can use planetary gravity and orbital resonance to make repeated encounters with Mercury.
1973
Mariner 10
Mariner 10 launches on a trajectory shaped by gravity-assist and resonance calculations that will allow repeated visits to Mercury.
1974
Mariner 10 Gravity Assist
Mariner 10 uses Venus for the first interplanetary gravity assist, placing the spacecraft on course for its first Mercury encounter.
Mariner 10 Mercury Flyby
Mariner 10 makes the first spacecraft flyby of Mercury, validating the trajectory that permits later repeat encounters.
Second Mercury Flyby
Mariner 10 returns to Mercury for a second flyby because its solar orbit is resonant with Mercury's orbital period.
1975
Third Mercury Flyby
Mariner 10 completes a third Mercury encounter, demonstrating the effectiveness of Colombo's repeat-flyby trajectory.
1999
BepiColombo Mission Naming
ESA names its planned Mercury mission BepiColombo in honour of Giuseppe Colombo's pioneering work on Mercury and planetary flyby trajectories.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.