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Loading contentApplying Newton's gravitation, Halley showed that comets recorded in 1531, 1607, and 1682 were one body on a 76-year orbit, and predicted its return in 1758.
The first demonstration that comets obey gravity and return on schedule — confirmed after Halley's death.
Facts on this topic will be cited from these primary and reference sources.
General reference for the history of astronomy, biographies, and cultural context.