Earth's gravity and sign designation
When Astrology was laid out so many years ago, the Earth was not counted as a planet and therefore was not considered to rule any of the zodiac signs. However, the Earth has gravity and is a celestial body inclusive of our solar system. It would not be inappropriate to suggest that the Earth be considered the ruler of Taurus instead of the planet Venus.
Taurus begins on April 20th and is a fixed, earth sign. Because Venus is also the ruler of Libra, some Astrologers have supported the idea that the Earth be the planetary ruler of Taurus.