????: 67P was formed in the Kuiper belt and ejectedinward of the Solar System.
Later, 67P encountered Jupiter and successively changed its orbit.
1840: Jupiter further changed the orbit and 67P began to lose nucleus mass via
vaporization by the Sun.
1959: The perihelion of 67P was brought inward to 1.29 AU.
1969: 67P was discovered by Soviet astronomers Klim Ivanovych Churyumov and
Svetlana Ivanovna Gerasimenko, named after whom as 67P/C-G.
2 March 2004: Rosetta was launched by ESA.
4 March 2005: Rosetta's first swing-by of Earth.
25 February 2007: Rosetta flew by Mars.
6 August 2014: Rosetta rendezvoused 67P/C-G.
10 September 2014: Rosetta entered the designed orbit of 67P/C-G.
12 November 2014: The lander of Rosetta landed on 67P/C-G.
13 August 2015: 67P/C-G came to perihelion.
27 July 2016: The Electrical Support System aboard Rosetta was switched off.
30 September 2016: Rosetta ended its mission by landing on 67P/C-G.
