"muff528" wrote:

"William R Thompson" wrote:

(about Wally Schirra's elapsed time in space)

Sigma 7: 9 hours 13 minutes 11 seconds
Gemini 6: 25 hours 51 minutes 43 seconds
Apollo 7: 260 hours 9 minutes 3 seconds

which adds up to 295 hours 13 minutes 57 seconds.

Is that taking relativistic time dilation into consideration? That's got
to be good for a -second or -two!

At orbital speed (about 8 km/sec) time dilation doesn't even
amount to one second over 295 hours. If I've crunched the
number right, it's in the microsecond range.

--Bill Thompson