The well known ancient Hindu scriptures are the Vedas, Puranas and Upanishadas. Astrology is considered as an eye of Vedas. Vastu Shastra is a science dealing with construction of houses buildings and other structures. This vidya is connected in two ways by space and time. Space is the unit connected to mankind and the concept of time is a very essential concept to; understand how vastu works?
Purchasing any new unit or moving in any new place is only possible if time or the kaal supports it. (Referring to dasha or antradasha).The concept of time is considered essential. Result depends on the various permutation and combinations of both the concepts. All these planets are important in astrology and vastu too. The planets are allotted with a directions and a separate purpose. If any planet like Mars or mangal in natal’s kundli is not strong, it will give adverse effect from south part of your house or any other unit. If your mangal mahadasha or antra dasha has begun, one is sure to get smashed and knowingly or unknowingly, one will make changes in southern part of their house which will give vastu dosh.
This is true that time and space takes the graph upward or down ward. Some times, it even keeps you in a state of dilemma.