I never really thought about the moon
moving. So I never really thought about
the moon’s speed. But every time I read
black history I learn something new about
my wonderful Black people and additonal
facts. Now, I will move on to the man
who calculated the speed of the moon.
Introducing Walter McAfee:
Walter S. McAfee- A Black man who is a
mathematician was the first to calculate
the speed of the moon. McAfee
was involved in the Project Diana
in the 1940s, a US Army program created
to figure out whether a high
frequency radio signal could
penetrate the earth’s outer
To test this, scientists wanted
to bounce a radar signal off the
moon and back to earth. But the
moon was moving too fast, impossible
to hit without knowing the precise
speed of it.
McAfee made the necessary
calculations on January 10, 1946,
the team sent a radar pulse through
a 40 feet antenna towards the moon.
2 and a half seconds after that, they
received a faint signal which showed
that transmission from the earth
could cross vast distances to outer
Official news of this scientific
breakthrough did not include
McAfee’s name, nor any acknowledement
that he did what he did in his role.
But Americans would have never
walked on the moon without the black
man named MCAfee and his calculations.
I wish more people would talk about
that. I’m going to have a journal full
of black inventors. I keep collected
the facts and learn more and more about
my Black People.
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