Timeline August 1684

Events in August 1684 3

• 1684 Edmond Halley's visit to Isaac Newton spurs the Principia A question about planetary orbits leads to Newton's masterwork In August 1684 the astronomer Edmond Halley travelled to Cambridge to ask Isaac Newton what shape a planet's orbit would take under an inverse-square force. Newton answered immediately that it would be an ellipse, having already worked out the proof, and promised to send it on. The resulting manuscript grew into the Philosophiae Naturalis Principia Mathematica, published in 1687.
• 1684 Venetian capture of Santa Maura Francesco Morosini opens Venice's Morean War offensive Venetian forces under Francesco Morosini captured the Ottoman-held island fortress of Santa Maura (Lefkada) in August 1684. The victory was the opening success of Venice's campaign to reclaim the Morea and Ionian islands from the Ottoman Empire. It was followed by the capture of Preveza on the Greek mainland later that year.
• 1684 Truce of Ratisbon signed France and the Holy Roman Empire agree a twenty-year truce Louis XIV of France and Emperor Leopold I signed the Truce of Ratisbon (Regensburg) on 15 August 1684, suspending the War of the Reunions. The truce confirmed French control of Strasbourg, Luxembourg and other territories France had annexed since 1679. It held for the full twenty years agreed, postponing further Franco-Habsburg conflict until the Nine Years War.