Such a progressed chart (usually superimposed over a natal chart) will indicate each progressed planet's position as it travels along its path over a passage of time, subsequent to birth. As it moves, it may form aspects to another progressed planet, or to a birthchart planet. Some of the planets such as Venus and Mercury move along quickly; others such as Uranus and Neptune hardly move at all.

The Time-Velocity Ratio Accounts for the Slow-Time Release of Astral Planetary Energies Subsequent to the Moment of Birth.

One day of astral, high-velocity slow-time equals three hundred and sixty-five and one-quarter days, or one year of physical, slow-velocity fast-time. This time-velocity ratio enables the astrologer, by erecting a progressed chart, to map and gauge, for each year after birth, the character and strength of progressed or changing astral planetary energies and their astral aspects as they bring about structural changes in the astral body, such as temporary aerials.

Progressed Aspects Release Energies That Build Temporary Stellar Aerials in the Astral Body. Aerials that Channel a Temporary Supply of Additional New Planetary Energies.

The permanent stellar aerial that forms across the astral body when two natal planets, say the Sun and Jupiter, aspecting each other at birth, allow the Sun-responsive and the Jupiter-responsive thought-centres of the astral body to pick up, radio-fashion, their particular planet's energies on a permanent or constant basis.