Rahu and Ketu: Boosters of Human Rocket

there are nine planets considered for the calculations in astrology. in the indian style however herchel, neptune and pluto are not considered. rahu and ketu mentioned in the indian system , are called DRAGONS HEAD & TAIL in the western system of astrology. Indian system although considers Rahu & Ketu as the shadows but also considers them more powerful than other planets. Rahu & Ketu when associated with any planet by means of combination,aspects or occupying the sign of any particular planet, takes the representation of that particular planet. Rahu & Ketu are also related with the past and present life that is they decide that what will be the final share of luck for an individual. one may consider a human life like a MUTISTAGE ROCKET, where all the boosters should blow in time to make the rocket reach its destination. if one or two boosters doesn't work then the rocket cannot reachthe destination, likewise a human life which carries its deeds of past life in the form of boosters will decide the fate of destination of our present life and all the activities are monitored by the strict control mechanisms of RAHU & KETU.

for more information on the subject u can also refer:
www.pantheon.org/areas/folklore/folktales/articles/rahu.html

http://www.world-mysteries.com/gw_rb_aliar.htm
www.komilla.com/pages/rahu-ketu.html