"Dave Kearton" wrote:

William R Thompson wrote:

I made the time-dilation factor as about 0.999999999644 (square
root of 1 minus beta-squared), with Schirra spending about 1062000
seconds in space at orbital speed and beta equal to 8 km/sec over the
speed of light (close enough to 300,000 km/sec). Schirra would have
lost about 400 microseconds.

African or European ?

Before I can answer that, I'll have to determine whether or
not all four hundred of them float or sink in water. Making that
measurement for microseconds could take a little time.

--Bill Thompson