Lately I have been showing a keen interest on astrology and doing some studying and looking into a lot on the subject. To get to my question why is there so much worry about planet retrogration, especially when it comes to Mercury. I also know that there is stuff along the line of one zodiac symbol occupying residence in the house of another symbol, because we have 2 different symbols occupying different areas. Also, me being Leo, are there any kind of effects, either positively or negatively, with mErcury being in retrograde while in that house.