NASA has spotted the crash site of a mystery rocket that slammed into the  far side of the moon in March, leaving behind a double crater.

New images taken May 25 and shared by NASA's Lunar Reconnaissance Orbiter on June 24 showed the unusual crater.

The collision resulted in two overlapping impact sites — an eastern  crater measuring 59 feet (18 meters) across and a western crater  spanning 52.5 feet (16 meters).

Astronomers expected the impact after discovering that an unidentified piece of space junk was on a collision course with the moon late last year.

But "the double crater was unexpected," the space agency said in a press release. "No other rocket body impacts on the moon created double craters."

NASA says two large masses on each end of the rocket may have caused the two craters

but that would be unusual, since spent rockets tend to have a heavy motor at one end and a lighter empty fuel tank at the other.

According to 2016 data from Arizona State University, at least 47 NASA rocket bodies have created "spacecraft impacts" on the moon.