Astronauts caused warming on the moon. It came from Fox news, so it must be true. The reason the Moon warmed up? Blame the astronauts Scientists have finally figured out the reason behind a small but noticeable uptick in the temperature of the moon's subsurface while it was under study by astronauts of the Apollo missions in the 1970s. The culprit? Blame those very same astronauts. The CBC explains: Astronauts walking on the moon or riding around in rovers disturbed the surface soil and exposed the darker soil beneath.