Planets move in the sky in their orbits around the Sun. Since this path of their movement is elliptical (not circular), so their distance from the Sun/earth also varies. In this movement when these planets are closest to earth/Sun they seem to be the most illuminated. This position of the planet is called exalted. Same way when the planet is at the farthest position from earth it seems to be the least illuminated. This position is called debilitated. Planets are at their strongest and most favorable positions when placed in their exaltation signs while in debilitation they are at their weakest and least favorable situation. Exaltation and debilitation sign of any planet is always opposite of each other (180 degree apart) as given in following table.
Traditional astrologers teach it in very entertaining manner:
Hi my name is Dr. Gaurav Agrawal. I am the instructor of palmistry and astrology at Indian Palmistry Institute. This blog is the free learning resource for those who are interested. Here i will also share my own personal findings about palmistry. Comments are welcome and appreciated.