Astrology is a word (from Greek: αστρολογία = άστρον, astron, "star" + λόγος, logos, "word") is any of several traditions or systems in which knowledge of the apparent positions of starts and celestial bodies is used to make the predictions for the person place or any entity. It is held to be useful in understanding, interpreting and organizing knowledge about reality and human existence on earth and much more. All are based on the relative positions and movements of various real and construed starts and celestial bodies, chiefly the Sun, Moon,Earth, other planets, Ascendant & Midheaven axes, and lunar nodes as seen at the time and place of the birth or other big event being studied.

Many of those who work or practice astrology believe that the positions of certain stars or celestial bodies either influence, or correlate with but do not influence, people's personality traits, important events in their lives, their behavior, their family and even physical characteristics.

Astrology is not considered to be a science but it is more than science and is totaly different rate from astronomy. For many astrologers the purported relationship between the stars, celestial bodies and events on earth need not be causal they are taken with utmost importance, nor even scientific. Although there are astrologers who try to put astrology on sound scientific principles, for many more it is a technology or science and an art that merges calculations with intuitive perceptions but 99% of times it is true or very similar to the happening to the person, his relative/family.

The core principles of astrology reflect general principles which have been made centuries back, which were universally accepted in the ancient world and are still accepted in the modern world, that events in the heavens must have analogies on Earth. From China to Babylon, the apparently untoward movement of a comet across the otherwise orderly movement of the heavens was taken as a portent of disaster: the very word still contains its "star" root, aster.