CANCEL
Missions
Badges
ISS Visitor
This astronaut visited the International Space Station.
Crossed Kármán Line
This astronaut crossed the Kármán Line (100 km), the internationally accepted boundary of space.
Elite Spacewalker
This astronaut is in the top 5% for total spacewalking time.
Space Resident
This astronaut has spent over a month in space.
Frequent Walker
This astronaut is in the top 5% for number of space walks.
Crewmates
234
Marsha S. Ivins
5
MISSIONS
55.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
248
Samuel T. Durrance
2
MISSIONS
25.6
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
249
Ronald A. Parise
2
MISSIONS
25.6
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
261
Tamara E. Jernigan
5
MISSIONS
63.1
DAYS IN SPACE
1
SPACEWALKS
0.3
DAYS SPACEWALKING
264
Michael A. Baker
4
MISSIONS
40.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
272
Stephen S. Oswald
3
MISSIONS
33.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
278
C. Michael Foale
6
MISSIONS
374.5
DAYS IN SPACE
4
SPACEWALKS
0.9
DAYS SPACEWALKING
287
Claude Nicollier
4
MISSIONS
42.5
DAYS IN SPACE
1
SPACEWALKS
0.3
DAYS SPACEWALKING
289
Curtis L. Brown Jr.
6
MISSIONS
57.7
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
303
Nancy J. Currie-Gregg
4
MISSIONS
41.6
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
304
Peter J. K. Wisoff
4
MISSIONS
44.3
DAYS IN SPACE
3
SPACEWALKS
0.8
DAYS SPACEWALKING
308
James H. Newman
4
MISSIONS
43.4
DAYS IN SPACE
6
SPACEWALKS
1.8
DAYS SPACEWALKING
324
Jerry M. Linenger
2
MISSIONS
143.1
DAYS IN SPACE
1
SPACEWALKS
0.2
DAYS SPACEWALKING
326
Steven L. Smith
4
MISSIONS
40
DAYS IN SPACE
7
SPACEWALKS
2.1
DAYS SPACEWALKING
329
Jean-François Clervoy
3
MISSIONS
28.1
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
332
William G. Gregory
1
MISSIONS
16.6
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
334
Wendy B. Lawrence
4
MISSIONS
51.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
348
Brent W. Jett
4
MISSIONS
41.8
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
357
Richard M. Linnehan
4
MISSIONS
59.9
DAYS IN SPACE
6
SPACEWALKS
1.8
DAYS SPACEWALKING
384
Scott D. Altman
4
MISSIONS
51.5
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
400
Scott J. Kelly
4
MISSIONS
520.4
DAYS IN SPACE
3
SPACEWALKS
0.7
DAYS SPACEWALKING
420
Duane G. Carey
1
MISSIONS
10.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
421
Michael J. Massimino
2
MISSIONS
23.8
DAYS IN SPACE
4
SPACEWALKS
1.3
DAYS SPACEWALKING
503
Gregory C. Johnson
1
MISSIONS
12.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
504
Michael T. Good
2
MISSIONS
24.8
DAYS IN SPACE
4
SPACEWALKS
1.2
DAYS SPACEWALKING
505
K. Megan McArthur
2
MISSIONS
212.6
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
506
Andrew J. Feustel
3
MISSIONS
225.4
DAYS IN SPACE
9
SPACEWALKS
2.6
DAYS SPACEWALKING
WIKIPEDIA EXCERPT
John Mace Grunsfeld is an American physicist and a former NASA astronaut. He is a veteran of five Space Shuttle flights and has served as NASA Chief Scientist. His academic background includes research in high energy astrophysics, cosmic ray physics and the emerging field of exoplanet studies with specific interest in future astronomical instrumentation. After retiring from NASA in 2009, he served as the Deputy Director of the Space Telescope Science Institute in Baltimore, Maryland. In January 2012, he returned to NASA and served as associate administrator of NASA's Science Mission Directorate. Grunsfeld announced his retirement from NASA in April 2016.