Consistent practice on charts where the birthtime is known but concealed is the only way to hone skills in rectifying a birthchart. Most delineations for these combinations can be found in the abundance of popular astrology books. Along with an analysis of the natal chart , astrologers use a wide variety of subsidiary charts and techniques not mentioned. Although the method and use of these techniques requires more detailed description, I will briefly summarize them below. Transits One of the main technique which is used by nearly all modern astrologers is transits.
Transits are the positions of the planets in the signs at a given time.
The relation of the planets through time to each other through sign and configuration is looked at as well as the relation of the planets' positions to the positions of the planets in the natal chart. Transits are as old as astrology itself. In his Project Hindsight research, Robert Schmidt found that the Hellenistic astrologers thought of transits in the context of memory and recollection. A planet by making a transit to the sign where a planet resides in the natal chart stirs memory about that planet. This brings the planets involved to the forefront at a given time.