In astrology, “planets” include the sun and moon, and Pluto as well. Each of these planets has a path we can trace, so we know where they were at our birth.
In our birth chart, planets are placed in signs and houses. They are labeled by the sign, plus degrees. Sun 19° Scorpio 53′ 39″ means that your sun is located in the “slice of pie” labeled Scorpio, at the 19th of 30th degrees, which are labeled counter clockwise.
Each planet has a distinct area of our life that it influences. The flavor of these parts of our lives are determined by sign placement, the Sabian Symbol, and house placement, as well as aspects (angles) they make with other planets.