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The long hunt for new objects in our expanding solar system

Kevin Orrman-Rossiter, University of Melbourne and Alice Gorman, Flinders University Recognise these planet names: Vulcan, Neptune, Pluto, Nemesis, Tyche and Planet X? They all have one thing in common: their existence was predicted to account for unexplained phenomena in our solar system. While the predictions of Neptune and Pluto proved correct, Nemesis and Tyche probably […]


Finding Pluto: the hunt for Planet X Kevin Orrman-Rossiter, University of Melbourne and Alice Gorman, Flinders University Our solar system’s shadowy ninth (dwarf) planet was the subject of furious speculation and a frantic search for almost a century before it was finally discovered by Clyde Tombaugh in 1930. And remarkably, Pluto’s reality was deduced using […]


The emerging new astronomy of the 17th century: Comets were not that important

Introduction Here I will be arguing that comets were not instrumental in the emergence of modern astronomy in the 17th century. This view, most notably propounded by Kuhn and Hellman , where observations of comets were of paramount importance in ushering in a post-Newtonian modern astronomy by the end of the 17th century. Heidarzadeh posits […]