Is Astrology scientific? The simple answer is yes—and no. Astrology, like medicine, is an art based on a science.

The natural world is not as chaotic as it seems on the surface. Science has always sought to discover the underlying order that governs the appearance and behaviour of phenomena, from sub-atomic particles to the movement of galaxies. Science also seeks an understanding of human behaviour through biology, psychology and economics, for example. Scientists set out to find "natural laws" that govern phenomena, then look for ways that the knowledge of these interacting laws (repeatable patterns of phenomena) can be applied for our benefit.

In the second part of the "What Is Astrology" series, Rob Tillett writes that the strength of astrology comes from the accumulated knowledge of centuries of research and observation, developed and scientifically organised within a deeply intuitive, even poetic, understanding of the essential nature of the world, consciousness and the environment. Combined with accurate mathematical and scientific data, today's astrologers can use this established knowledge in the generation of valuable psychological, economic, or predictive profiles.