Astrology is the study of planetary influences and their affect on the world and those in it. Sailor Moon draws heavily on astrology, from the Senshi powers to their personalities, as you'll see in the following pages. Here is a nice basic definition of astrology, quoted from the alt.astrology faq:
"Astrology involves determining the exact position in the zodiac (not just by sign, but by degree and minute, that is, the specific part of the sky) of the Sun, the Moon, and 8 planets (Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto) at the time of a person's birth. The zodiacal degree of other points and bodies, such as the Moon's North and South Nodes, asteroids, Uranian points, and Arabic parts, are included by some astrologers. One also calculates the positions of 12 "houses" which are specific to the exact place and time of birth. The location of planets in these houses and the sign on the cusp of each house are important sources of information in chart interpretation. One also looks at the angular distances in the zodiac between each pair of planets; certain specific angular distances, called "aspects," are considered meaningful. All of this information is necessary to determine the astrological influences present at a person's birth and to formulate predictions for the future. The sign in which the Sun and Moon fall is only one very small part of the picture."

The astrological information on the following pages was gathered by me from a variety of sources, mostly from 3 books, Linda Goodman's Sun Signs, Linda Goodman's Love Signs, and Astrology For Adults by Joan Quigley. Most of the real credit for the astrology information goes to my dear friend Stacey who I drove crazy with constant (and probably stupid) questions on astrology. She's the one who analyzed the birth charts I made for the Senshi, and it's her info on the various pages I have here. She was a huge help to me! Thanks, Pook!!!
I used the Senshi's birthdays plus how old they were when Bishoujo Senshi Sailor Moon started in Japan to come up with the natal (birth) charts. The charts are loose at best, but I thought the info they showed was interesting. And fun, too. :) Obviously, you can take our interperations any way you like. And since I'm sure someone will ask, no, I don't really believe in astrology as a predictor of the future or anything like that. I think it's interesting, though, but that's about it.