What's on the far side of the moon? Well, not darkness.

It took less than a week for NASA Administrator Bill Nelson's gaffe to make it to social media. 

Over an hour into a budget hearing for the U.S. space agency, a congressman asked Nelson why China is sending spacecraft to the "backside" of the moon. 

"They are going to have a lander on the far side of the moon, which is the side that's always in dark," said Nelson, a former senator and astronaut, during the April 17 hearing. "We're not planning to go there."

He proceeded to tell...