Hora calculation , Hours in a day , Reason behind the Naming of 7 days in a week - Astrology - Tamil Podcast

Hora calculation , Hours in a day , Reason behind the Naming of 7 days in a week - Astrology - Tamil Podcast 

What is Hora ? Relationship between hora and hours ? How the naming of each day is been made ? Sundays start with this HORA .. Reason behind the Naming of 7 days in a week.