-{{BLP unsourced|date=December 2021}}
-'''Christopher Williams''', 38, grew up in Potomac, Maryland. He 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.
+{{Infobox astronaut
+| name = Christopher L. Williams
+| image = Christopher Williams white background.jpg
+| caption =
+| type = [[NASA]] Astronaut
+| birth_name =
+| birth_date =
+| birth_place = [[New York City]], USA
+| status = Active
+| alma_mater = {{unbulleted list|[[Stanford University]]|[[Massachusetts Institute of Technology|Harvard Medical School]]}}
+| occupation = {{hlist|Medical Physicist}}
+| awards =
+| selection = [[NASA Astronaut Group 23|NASA Group 23]]
+| space_time =
+| evas =
+| eva_time =
+| missions =
+| insignia =
+| retirement =
+| website =
+}}
+
+'''Christopher Williams''', a [[NASA]] astronaut candidate and medical physicist. Williams was selected to join the [[NASA Astronaut Group 23|2021 Astronaut Candidate Class]].
+
+==Background==
+
+Christopher L. Williams grew up in Potomac, Maryland. He 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.<ref
+name="nasa_20211206_bio"/>
+
+On December 6, 2021, Williams was selected to join NASA's 23rd astronaut
+candidate class.<ref name="nyt_20211206_astronauts"/>
+
+==References==
+
+{{reflist|refs=
+
+<ref name="nasa_20211206_bio">{{cite web
+ |url = https://www.nasa.gov/astronauts/biographies/christopher-l-williams/biography
+ |title = NASA Astronaut Candidate Christopher L. Williams
+ |first = Kelli
+ |last = Mars
+ |date = 6 Dec 2021
+ |work = [[NASA]]
+ |access-date = 7 Dec 2021
+ |url-status = live
+}}</ref>
+
+<ref name="nyt_20211206_astronauts">{{cite news
+ |url = https://www.nytimes.com/2021/12/06/science/nasa-astronaut-class.html
+ |title = NASA Introduces Class of 10 New Astronaut Candidates
+ |first = Joey
+ |last = Roulette
+ |date = 6 Dec 2021
+ |work = [[New York Times]]
+ |access-date = 7 Dec 2021
+ |archive-date = 7 Dec 2021
+ |archive-url = https://web.archive.org/web/20211207021412/https://www.nytimes.com/2021/12/06/science/nasa-astronaut-class.html
+ |url-status = live
+}}</ref>
+
+}}
-In November 2021 he is selected as a NASA astronaut.
{{NASA Astronaut Group 23}}
[[Category:Astronauts]]