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Sergei Avdeyev | |
|---|---|
 | |
| Born | (1956-01-01)1 January 1956 (age 69) |
| Status | Retired |
| Nationality | Russian |
| Occupation | Engineer |
| Awards | Hero of the Russian Federation |
| Space career | |
| Roscosmos cosmonaut | |
Time in space | 747d 14h 14m |
| Selection | 1987 |
| Missions | Soyuz TM-15 (Mir EO-12),Soyuz TM-22 (Mir EO-20),Soyuz TM-28/Soyuz TM-29 (Mir EO-26/27) |
Mission insignia |     |
Sergei Vasilyevich Avdeyev (Сергей Васильевич Авдеев; born 1 January 1956) is a former Russianengineer andcosmonaut.
Avdeyev was born inChapayevsk,Samara Oblast (formerly Kuybyshev Oblast),Russian SFSR. He graduated fromMoscow Engineering Physics Institute in 1979 as anengineer-physicist[1]. From 1979 to 1987 he worked as an engineer forNPO Energiya. He was selected as a cosmonaut as part of theEnergia Engineer Group 9 on 26 March 1987. His basic cosmonaut training was from December 1987 through to July 1989. He retired as a cosmonaut on 14 February 2003.
Avdeyev at one point held the record for cumulative time spent in space with 747.59 days in Earth orbit, accumulated through three tours of duty aboard theMir Space Station. He has orbited the Earth 11,968 times traveling about 515,000,000 kilometers. In August 2005, this record was taken by another cosmonaut,Sergei K. Krikalev; it has since been surpassed by other cosmonauts, the current record holder beingOleg Kononenko since February 2024.
Avdeyev is married with two children. He is anamateur radio operator, and hiscall sign is RV3DW.
For a long time, Avdeyev held therecord fortime dilation experienced by a human being.[1][2][3] In his 747 days aboardMir, cumulative across three missions, he went approximately 27,360 km/h and thus aged roughly 0.02 seconds (20milliseconds) slower from an Earthbound person's perspective,[4] which is considerably more than any other human being, exceptSergei Krikalev.[5] This is due to thespecial relativistic effect oftime dilation and is not properly thought of astime travelling as described by mainstream culture. A common misconception is that theApollo program astronauts hold the record—they did go faster than Avdeyev, but they were only in space for a few days.
Avdeyev is 00.2 seconds younger than he would have been had he never traveled in space.
'The greatest time traveler so far is (cosmonaut) Sergei Avdeyev, who, by virtue of being on space flights for 748 days, is one-fiftieth of a second younger than if he had stayed home. So that man has traveled one-fiftieth of a second into the future.'
Spending just over two years in Mir's Earth orbit, going 17,500 miles per hour, put Sergei Avdeyev 1/50th of a second into the future…'he's the greatest time traveler we have so far.'