Mechanical Planet

The Mechanical Planet was an artificial planet which was constructed by the Mechanoids of Mechanus.

In the early 27th century, after "two hundred years" of peace between humans and Daleks, the unknown Mechanical Planet moved through the universe destroying planets it came across, serving a potential threat to both Earth and Skaro. Earth possessed few weapons because of the many years of peace and did not understand how to use the Daleks'. The Golden Emperor came to Earth and assured ambassador Brit Sovard that with their weapons returned to them they could deal with the planet. Brit reluctantly agreed and humans Jay and Gregg rode with the Emperor on his ship to ensure the success of the mission. After the planet was destroyed, the Emperor asked that the humans warn Earth and "all the planets in every sky" that the Daleks would come to conquer them, beginning a new conflict. (COMIC: The Mechanical Planet)

The Daleks later traced the Mechanical Planet to Mechanus. On Mechanus, the Mechanoids plotted to construct a Mechanical Sun to burn its way through space. (COMIC: The World That Waits)