Thanks to NASA, we’re able to take a peak at one of the most elusive places in the solar system – the far side of the moon. No matter where you are on Earth, it always faces away from you, so you never get the chance to get a good look at it.It doesn’t look like it to us, but the moon does actually rotate every 27 Earth days. Talk about a long day! It also takes 27 days for the moon to orbit the Earth. It’s called a synchronous rotation and it prevents us from seeing the full moon. We only see about 59% of the moon’s surface.
Our first look at the dark side of the moon came in 1959, thanks to the Soviet Union’s Luna 3 spacecraft.
Nowadays, it’s a little clearer:
Read more here:: NASA Gives Us A Peak At The Dark Side Of The Moon