The absence of any astrological explanation as to how the planets can affect people's lives amounts to:

Science is a system for collecting knowledge to understand the world, while superstition is a non-scientific belief in magical connections. Superstition can be religious, cultural, or personal. 
Superstition and science can conflict in medical practices. For example, traditional healers may use superstition to treat health problems, but medical professionals use evidence-based practices. Traditional healers may use unsterilized instruments in unsafe environments, which can lead to harmful, potentially fatal impacts on patients.