Success· Flight 1
Soyuz MS-28
- Launched
- Nov 27, 2025 · 09:27 UTC
- Rocket
- Soyuz 2.1a
- From
- 31/6, Baikonur Cosmodrome
- Destination
- ISS
- Landed
- Jul 26, 2026
Crewmates
Sergey Kud-SverchkovRoscosmosSergey MikayevRoscosmos

Active· NASA · American
Christopher Williams grw up in Potomac, Maryland and graduated from Stanford University in 2005 with a bachelor’s degree in physics and a doctorate in physics...

Spaceflights
1
first flight
Time in space
241days
Spacewalks
1
Spacewalking
7 h 20 m
in total
Bars drawn to scale, 0 to 8 hours
Expedition 74 EVA 2
Jun 30, 2026
Success· Flight 1
Christopher Williams grw up in Potomac, Maryland and graduated from Stanford University in 2005 with a bachelor’s degree in physics and a doctorate in physics from MIT in 2012, where his research was in astrophysics. Williams is a board-certified medical physicist, completing his residency training at Harvard Medical School before joining the faculty as a clinical physicist and researcher. He most recently worked as a medical physicist in the Radiation Oncology Department at the Brigham and Women's Hospital and Dana-Farber Cancer Institute in Boston. He was the lead physicist for the Institute’s MRI-guided adaptive radiation therapy program. His research focused on developing image guidance techniques for cancer treatments.
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