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.
Space Resident
This astronaut has spent over a month in space.
Crewmates
161
David M. Walker
4
MISSIONS
30.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
269
James S. Voss
5
MISSIONS
202.2
DAYS IN SPACE
4
SPACEWALKS
0.9
DAYS SPACEWALKING
297
Kenneth D. Cockrell
5
MISSIONS
64.5
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
305
Janice E. Voss
5
MISSIONS
49.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
308
James H. Newman
4
MISSIONS
43.4
DAYS IN SPACE
6
SPACEWALKS
1.8
DAYS SPACEWALKING
320
James D. Halsell Jr.
5
MISSIONS
52.4
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
322
Donald A. Thomas
4
MISSIONS
43.3
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
365
Susan L. Kilrain Still
2
MISSIONS
19.7
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
366
Roger K. Crouch
2
MISSIONS
19.7
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
367
Gregory T. Linteris
2
MISSIONS
19.7
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
375
Steven W. Lindsey
5
MISSIONS
62.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
380
James F. Reilly II
3
MISSIONS
35.4
DAYS IN SPACE
5
SPACEWALKS
1.3
DAYS SPACEWALKING
390
Janet L. Kavandi
3
MISSIONS
33.8
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
414
Charles O. Hobaugh
3
MISSIONS
36.3
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
WIKIPEDIA EXCERPT
Michael Landon Gernhardt is a NASA astronaut and manager of the Environmental Physiology Laboratory, and principal investigator of the Prebreathe Reduction Program at the Lyndon B. Johnson Space Center.