Edmund Halley

Edmond Halley (1656-1742) was an English astronomer, mathematician, and physicist, renowned as the second Astronomer Royal at Greenwich Observatory from 1720. A key figure in early modern science, he cataloged southern stars during his 1676-1677 St. Helena expedition, published the first telescopic southern star catalog, and advanced solar system measurements via Venus transits. Halley is best known for calculating the periodic orbit of the comet observed in 1531, 1607, 1682, and others, predicting its 1758 return in his 1705 A Synopsis of the Astronomy of Comets—verified posthumously, confirming Newtonian mechanics. He supported Isaac Newton's Principia Mathematica publication. No records link Halley to UAP/UFO research, military/government UFO programs, or related fields, as these emerged centuries later.