International Sidereal Astrology Association

Welcome to the International Sidereal Astrology Association (ISAA)—the leading global organization dedicated exclusively to Sidereal Astrology, True Sky Astrology, and Constellational Astrology.

We restore astrology to the real astronomical sky.

If you’ve ever wondered why your tropical zodiac sign doesn’t match the actual constellation behind the Sun… you’re not alone. The ISAA explores the measurable difference between Sidereal and Tropical astrology, the astronomical basis of the 13-sign zodiac, and the documented origins of astrology in ancient Mesopotamia and Babylon.

This is astrology aligned with observation—not symbolism detached from the heavens.

On this channel, you’ll find:

• In-depth education on Sidereal Astrology
• Real-sky planetary transit analysis
• Fixed star research
• Ancient Mesopotamian and Babylonian astrological doctrine
• Live discussions and expert interviews
• Constellation-based chart interpretation