Astral projection

Astral projection is a psychic power that involves creating an astral body which leaves the physical body. It can be more clearly thought of as a form of travel where the soul leaves the body. Humans developed a concept where astral projection allowed for psychically travelling to different planets as opposed to doing so in starships.

The Fendahl had such enormous energies that it was able to astral project itself from the Fifth Planet to Earth before being traped in a time loop and possibly raveging Mars along the way. (DW: Image of the Fendahl)

The Osirians were capable of mentally projecting themselves, which could be thought of as astral projection, and also designed psi-projectors which let them travel through space using only the power of their minds. (DW: Pyramids of Mars, MA: The Sands of Time)