Banneker pursued his interest in astronomy throughout his life. Lacking formal training, he taught himself astronomical principles, made observations of the night sky, and developed his own methods for calculating astronomical phenomena.

Banneker became known for his ability to accurately predict solar eclipses, a skill that demonstrated his profound understanding of astronomy and mathematics. This was considered a significant achievement given the limited resources available to him.

Even after his almanacs ceased publication, Banneker continued to study astronomy, make observations, and explore other scientific interests. He remained a dedicated scholar until the end of his life.