from a glossory page of astrology terms @
http://www.denelder.com/astrology/astrol02.html
which I was linked to from
http://en.mimi.hu/astrology/transit.html:
Transit: is the movement of a Planet as it goes into and out of a Sign or House; it is this traveling by the Planets that form the various Aspects. Now when a Planet is moving through ...transiting... it carries its energies and influences along with it, and those energies and influences then effect, impact, and influence whatever Sign or House it is moving past... so that the Sign or House's strengths and weaknesses of attributes are impacted.
end of exerpt
Since the accendant changes on an hourly basis, the houses referenced here would be your natal house positions, although one could use hourly data to chart the actions of the day, that would take a lot of patience and knowledge.
