o follow the Moon waxing and waning throughout the different zodiac signs is an elegant way to be more aware of your own constant change in the emotional landscape and how your emotional outlook is coloring the perception of events and circumstances. The Moon is the fastest moving planet we observe in astrology and is known for her fickle nature. Every 2 ½ days there is a variation in the way we subtly feel and react from that gut level instinct. The Moon is representing our emotional filter and the way we perceive life. The position of the Moon in your personal chart is one of the most important points of an astrological reading. Dr. Porco further believes that Enceladus's orbit could have been much more eccentric in the past. The greater the eccentricity, the greater the tidal squeezing, and the resulting structural variations produce heat. In this case, the heat would have been saved inside the icy moon, melting some of the ice to replenish the liquid water sea. Dr. Porco continued to explain that "(T)he tidal flexing occurring now is not enough to account for all the heat presently coming out of Enceladus. One way out of this dilemma is to assume that some of the heat observed today was generated and stored internally in the past... (N)ow that the orbit's eccentricity has lessened, the heat emanating from the interior is a combination of heat produced today and in the past." Europa: Planetary scientists generally think that a layer of liquid water swirls around beneath Europa's surface, and that heat from tidal flexing causes the subsurface ocean to remain liquid. It is estimated that the outer crust of solid ice is about 6 to 19 miles thick, including a ductile "warm ice" layer that hints that the liquid ocean underneath may be 60 miles deep. This means that Europa's oceans would amount to slightly more than two times the volume of Earth's oceans.