Originally Posted by SouthernBlood
Well, quite simply, NASA wanted to have a flag to plant in the lunar surface. There is no wind, so the flag would just hang there limp. That would not be very impressive. Also, it would be just a swatch of colored fabric in photos. There would be no way to tell that it was an American flag. So, they came up with an ingenious way of sticking a
flag in the surface that looked like it were waving. The fabric of the flag has a wire mesh sewn into it. The flag rolls up into a nice little package. When on the Moon, the astronauts extend the pole and stick it into the ground. They can then unroll the flag. Working in heavy spacesuits, though, it is easier to unroll the flag and then stick it into the ground. The lunar surface is grainular and tough to poke the flag into. So, they have to rock the pole back and forth shoving it down into the ground. Watching on the TV, this back and forth motion makes the flag swing back and forth like it is waving.
The wire mesh is sewn into the fabric so that the flag will appear to stand out straight in the absense of wind. But, a flag sticking straight out from the pole doesn’t look natural. So, the astronauts often would extend the flag and bend ripples into it so that it looked more like it were w
aving. Look at video of the astronauts moving around the flag. It looks like it is waving, but it is frozen in position as the astronauts move by. It doesn’t actually wave. As it turns out, the flag didn’t really unroll as smoothly on the Moon as it did in tests on Earth, so the astronauts didn’t have to do much work to make it look like it were waving. It tended to look crinkly anyway.