NASA said: “In addition to the vertical pole that supported the side of the flag, they included a horizontal arm along the top of the flag to hold it out.
“Sometimes the astronauts did not fully extend that arm, so the flag would not be stretched flat.
“That would leave some ripples in the fabric, making the flag appear in photographs as if it were waving in the breeze, even when it was perfectly motionless.”
And to mark the 50th anniversary of the Apollo 11 Moon landing, the flag-waving conspiracy was debunked by Profesor Anu Ojha of the National Space Centre.
Speaking at the Royal Observatory Greenwich about the Moon landing theories, the space expert dubbed the flag-planting a “crowning moment” of the Moon landing.
And yet, despite what conspiracists have claimed over the years, the US flag did not wave or flap on the Moon.