CANCEL
Missions
Badges
Crossed Kármán Line
This astronaut crossed the Kármán Line (100 km), the internationally accepted boundary of space.
Crewmates
135
Brewster H. Shaw Jr.
3
MISSIONS
22.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
158
David C. Leestma
3
MISSIONS
22.2
DAYS IN SPACE
1
SPACEWALKS
0.1
DAYS SPACEWALKING
165
James F. Buchli
4
MISSIONS
20.4
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
176
John O. Creighton
3
MISSIONS
16.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
226
Richard N. Richards
4
MISSIONS
33.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
227
James C. Adamson
2
MISSIONS
13.9
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
245
Charles D. Gemar
3
MISSIONS
24.2
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
265
Kenneth S. Reightler Jr.
2
MISSIONS
13.7
DAYS IN SPACE
-
SPACEWALKS
-
DAYS SPACEWALKING
WIKIPEDIA EXCERPT
Mark Neil Brown is an American engineer, retired colonel in the United States Air Force and former NASA astronaut.