What intellectual achievement is Benjamin Banneker known for?

Benjamin Banneker is primarily recognized for his remarkable intellectual achievement in teaching himself calculus and trigonometry. This self-directed study highlighted his exceptional mathematical abilities and contributed to his work as an astronomer and mathematician. Banneker's understanding of these advanced subjects allowed him to successfully predict lunar and solar eclipses and to create a highly regarded almanac that included various scientific calculations. His achievements were particularly notable considering the limited formal educational opportunities available to African Americans in his time, especially in the fields of mathematics and science. Banneker's accomplishments served to illustrate both his personal intellect and the potential of those who faced societal restrictions, thus contributing significantly to the fields of mathematics and astronomy during the 18th century.