I'm sorry, but...no. The signs didn't change. There's a whole lot more to astrology than what you read on the Internet, even if NASA is involved. While the ancient Babylonians were the first to implement the signs and named them for the 12 Constellations that the sun moved through, it was Ptolemy, in the 2nd century, who gave us the zodiac that we know today. In fact, "zodiac" comes from a Greek term meaning "circle of animals." It's based on the seasons and ecliptic (the sun's path), and is called the Tropical Zodiac. Hindus go by the Sidereal Zodiac (based on the rising sign at time of birth), and astronomers - which are different from astrologers - go by the NASA-inspired Constellation Zodiac. Rest easy, you're still a Virgo.