Rahu ketu
Rahu and Ketu are the two shadow planets that are used in Vedic astrology which developed in ancient India. These two planets were originally ignored in the Western astrology, but later were incorporated as the Lunar North Node (Rahu) and Lunar South Node (Ketu). All the seven main planets move directly whereas these two always move in a retrograde manner (opposite in direction to the other planets). Their retrograde movement depicts their peculiar nature as compared to any other planets.Now let us see what Rahu and Ketu are, and why do they move backwards? Rahu and Ketu are the two mathematically determined points in space where the ecliptic of the planet Moon crosses the ecliptic of the planet Sun as seen from Earth. The northern point of intersection is called Rahu (Lunar North Node) and the southern point is called Ketu (Lunar South Node). So, these are two shadow planets, and do not have a real body as the other seven planets of Vedic Astrology. Being shadow plane...