Astronaut youngest person to fly in space is Gherman Titov, who was 25 years old when he flew Vostok 2. (Titov was also the first person to suffer space sickness). The oldest person who has flown in space is John Glenn, who was 77 when he flew on STS-95. 438 days is the longest time spent in space, by Russian Valeri Polyakov. As of 2006, the most spaceflights by an individual astronaut is seven, a record held by both Jerry L. Ross and Franklin Chang-Diaz. The farthest distance from Earth an astronaut has traveled was , when Jim Lovell, Jack Swigert,
Chinese as a foreign language in 2001, while the later has not been found so far—Ricci made the transcription system developed in 1598, and in 1626 it was finally published, with minor modifications, by another Jesuit Nicolas Trigault in a guide for new Jesuit missionaries. The system continued to be in wide use throughout the 17th and 18th century. It can be seen in several Romanized Chinese texts (prepared mostly by Michael Boym and his Chinese collaborators) that appeared in Athanasius Kircher's "China Illustrata". The earliest Chinese grammars were produced by the Spanish Dominican missionaries. The earliest surviving one is by Francisco Varo (1627–1687). His