Planets express their inherent energy in different ways based on their sign in your birth chart. But you must also know that this nature of planets is subject to change when the planet conjuncts with any other planet or sign. For example, if Rahu and Ketu conjunct with the most powerful planets like Sun and Moon, they not only cause eclipses but may also change the nature of Sun and Moon. Then the association of any malefic planet can evaporate the good natural results of any planet. Maraka (astrology refers to the planet or planets that cause death at the end of a particular life-span; if the assessed life-span is not over they cause accident, ill-health, poverty and misery during the course of their dasha or antra-dasha or in the period of the planet associating/influenced by them. Each lagna has a fixed maraka or marakas. The two luminaries, the Sun and the Moon, and the lord of the 9th house generally do not become marakas. In astrology, a transit refers to the movement of a planet through the zodiac and its current position in relation to a person's natal chart.In Sanskrit it is termed as "gochar" and this terminology is still used among Hindi or Sanskrit language speaker. The word transit literally means "in motion" or "in movement" or the "action of passing through"Transits are used to make predictions about future events and to understand the current influences on an individual's life. The planets in a person's natal chart remain in the same position, while the transiting planets move through the zodiac, thus forming different aspects with the natal planets. The aspects formed between transiting and natal planets are considered to be powerful indicators of the current influences on the individual's life. Some commonly used transits include the major transits of the slow-moving planets, such as Saturn, Jupiter, and Uranus, Neptune and Pluto, and the lunar nodes, Rahu and Ketu.These transits can indicate major changes or turning points in an individual's life.