A new study by the Journal of Geophysical Research Planets has found that an old spacecraft left on the moon's surface could be causing a planetary phenomenon.

The spacecraft in question is Apollo 17's lunar lander, which was left on the moon in 1972.

The lunar lander module sits a few hundred yards away from instruments that have been recording seismic tremors. The tremors offer scientists new insights into how the moon responds to its surroundings and what can effect it's seismic activity.

The "moonquakes" are not dangerous and would likely be undetectable to humans standing on the moons surface.