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Sergey Avdeev

Sergei Vasilyevich Avdeyev is a former Russian engineer and cosmonaut.

Time dilation record
For a long time, Avdeyev held the record for time dilation experienced by a human being. In his 747 days aboard Mir, cumulative across three missions, he went approximately 27,360 km/h and thus aged roughly 0.02 seconds (20 milliseconds) slower from an Earthbound person's perspective, which is considerably more than any other human being, except Sergei Krikalev. This is due to the special relativistic effect of time dilation and is not properly thought of as time travelling as described by mainstream culture. A common misconception is that the Apollo program astronauts hold the record—they did go faster than Avdeyev, but they were only in space for a few days. ==Spaceflights==
Spaceflights
Soyuz TM-15 – 27 July 1992 to 1 February 1993 – 188 days, 21 hours, 41 minutes, 15 seconds • Soyuz TM-22 – 3 September 1995 to 29 February 1996 – 179 days, 1 hour, 41 minutes, 45 seconds • Soyuz TM-28 and Soyuz TM-29 – 13 August 1998 to 28 August 1999 – 379 days, 14 hours, 51 minutes, 9 seconds ==Spacewalks (42 hours, 2 minutes)==
Spacewalks (42 hours, 2 minutes)
• 1. MIR EO-12 – 3 September 1992 – 3 hours, 56 minutes • 2. MIR EO-12 – 7 September 1992 – 5 hours, 8 minutes • 3. MIR EO-12 – 11 September 1992 – 5 hours, 44 minutes • 4. MIR EO-12 – 15 September 1992 – 3 hours, 33 minutes • 5. MIR EO-20 – 20 October 1995 – 5 hours, 11 minutes • 6. MIR EO-20 – 8 December 1995 – 0 hours, 37 minutes • 7. MIR EO-26 – 15 September 1998 – 0 hours, 30 minutes • 8. MIR EO-26 – 17 November 1998 – 5 hours, 54 minutes • 9. MIR EO-27 – 23 July 1999 – 6 hours, 7 minutes • 10. MIR EO-27 – 28 July 1999 – 5 hours, 22 minutes ==Honours and awards==
Honours and awards
Hero of the Russian Federation (February 5, 1993) - for the successful implementation of spaceflight on the orbital scientific research complex Mir and displaying courage and heroism • Order of Merit for the Fatherland; • 2nd class (22 November 1999) - for courage and heroism displayed during prolonged space flight on the orbital scientific research complex Mir • 3rd class (April 1, 1996) - for the successful implementation of spaceflight on the orbital scientific research complex Mir and displaying courage and heroism • Medal "For Merit in Space Exploration" (April 12, 2011) - for the great achievements in the field of research, development and use of outer space, many years of diligent work, public activities • Chevalier of the Legion of Honour (France, March 1999) • Pilot-Cosmonaut of the Russian Federation (February 5, 1993) • Honorary Citizen of Chapayevsk, Samara Oblast (2004) ==See also==
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