Fixed stars.
I don't normally go there with astrology (though I gather it's more important in horary). Wanna guess why?
Anyway: fixed stars.
A fixed star in a prominent part of your chart, through a close (one or two degree) aspect to your Sun, Moon, or Ascendant sign will impart some of those qualities to your basic nature. In close aspect to one of your planets, it will affect the affairs of that planet (for example, Mercury your mind, Venus your love nature, and Mars your energy and sexuality).
Caput Algol in Taurus at 26 degrees has long been held to be the most malevolent star in the heavens, and signals beheadings. It is now considered to be a point in your chart that shows you losing your head over something or someone. An aspect of Caput Algol to your Venus could indicate a tendency to fall obsessively in love with your paramours.
Unfortunately, true.
