Path of comets
                                Date
                            
                            
                                21 January 1665
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Unknown, Artist
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                vol1 p258
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 300mm
width (page): 180mm
                            
                        
                            
                            
                            width (page): 180mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Content object
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                A figure found among the papers of Jeremiah Horrocks (?1617-1641) illustrating his study of a comet's path, which appears elliptical. This is the figure enclosed with the original letter (EL/W1/14) sent by John Wallis to Henry Oldenburg dated 21 January 1665, where Wallis points out that Johannes Hevelius's hypothesis about the motion of comets is not new. The letter was  read to the Royal Society on 25 January 1665.
This is copied from LBO/1/221a.
                            
                            
                        
                            
                            
                            This is copied from LBO/1/221a.
                                Object history
                            
                            
                                At the meeting of the Royal Society on 25 January 1665, ‘There was read a letter from Dr. Wallis to Mr. Oldenburg, dated at Oxford January 21, 1664/5, containing several observations of his upon the comet, and upon Mr. Hevelius’s and Mr. Horrox’s hypotheses concerning the nature of comets in general (Birch 2:11).
                            
                            
                        
                            
                            
                            
                                Related fellows
                            
                            
                                John Wallis (1650, British) , Mathematician
Johannes Hevelius (1611 - 1687, German/Polish) , Astronomer
                            
                        
                            
                            
                            Johannes Hevelius (1611 - 1687, German/Polish) , Astronomer
                                Associated place