An enduring question ever since the manned moon landings of the 1960s has been: Are the flags planted by the astronauts still standing?
Now, lunar scientists say the verdict is in from the latest photos of the moon taken by NASA's Lunar Reconnaissance Orbiter Camera (LROC): Most do, in fact, still stand.
"From the LROC images it is now certain that the American flags are still standing and casting shadows at all of the sites, except Apollo 11," LROC principal investigator Mark Robinson wrote in a blog post today(July 27). "Astronaut Buzz Aldrin reported that the flag was blown over by the exhaust from the ascent engine during liftoff of Apollo 11, and it looks like he was correct!"
Each of the six manned Apollo missions that landed on the moon planted an American flag in the lunar dirt.
Scientists have examined images of the Apollo landing sites before for signs of the flags, and seen hints of what might be shadows cast by the flags. However, this wasn't considered strong evidence that the flags were still standing. Now, researchers have examined photos taken of the same spots at various points in the day, and observed shadows circling the point where the flag is thought to be."
Most scientists had assumed the flags hadn't survived more than four decades of harsh conditions on the moon.
"Intuitively, experts mostly think it highly unlikely the Apollo flags could have endured the 42 years of exposure to vacuum, about 500 temperature swings from 242 F during the day to -280 F during the night, micrometeorites, radiation and ultraviolet light, some thinking the flags have all but disintegrated under such an assault of the environment," scientist James Fincannon, of the NASA Glenn Research Center in Cleveland, wrote in the Apollo Lunar Surface Journal.