A Chinese space probe is moving into position to land on the far side of the moon for the first time, the official Xinhua News Agency reported on Sunday, a mission seen as an important step as the country looks to push its space program forward.

The probe, the Chang'e-4, entered a planned orbit on Sunday "to prepare for the first-ever soft landing on the far side of the moon," the news agency said, citing the China National Space Administration. It didn't say when the landing would occur.

The moon is tidally locked to Earth, rotating at the same rate that it orbits our planet, so the far side is never visible from Earth. Previous spacecraft have seen the far side of the moon, but none has landed on it.