Forum - ALIEN SPACESHIP ON THE MOON flyover bef. landing APOLLO 20

a me risulta che la missione apollo 20 fu cancellata.

Apollos 18–20
Originally, NASA produced fifteen flight-worthy Saturn Vs; inclusive of two unmanned tests, this was enough to provide thirteen manned missions; these would have been the missions that took place plus Apollo 18 through Apollo 20.

Cancellation
The first mission to be canceled was Apollo 20. On January 4, 1970 NASA announced it was canceling the Apollo 20 as its Saturn V rocket was now needed for the Skylab space station and budget restrictions had limited the Saturn V production to the original 15 flight models.

Then on September 2, 1970, NASA announced it was canceling what were to be the Apollo 15 and Apollo 19 missions. Apollo 15 was originally meant to be an H mission — like Apollo 12, 13 and 14. These cancellations meant that Apollo 15 became a J mission — three day stay on the moon with the lunar rover and that Apollo 18 would no longer be launched.