Remembering the Planets and what the heck happened to Pluto

My very earnest mother just stole uncle Ned’s Pants… got a kick in the rear. 

Image result for plutoIn 1930, Originally thought to be ninth planet of our solar system, Pluto, was discovered by Claude W. Tombaugh at Lowell Observatory in Flagstaff, Arizona; it was announced March 13. Pluto was originally considered the ninth planet from the Sun.

Its status as a major planet fell into question following further study of it and the outer Solar System over the next 75 years. Starting in 1977 with the discovery of the minor planet Chiron, numerous icy objects similar to Pluto with eccentric orbits were found. The scattered disc object Eris, discovered in 2005, is 27% more massive than Pluto. The understanding that Pluto is only one of several large icy bodies in the outer Solar System prompted the International Astronomical Union (IAU) to formally define “planet” in 2006.

This definition excluded Pluto and reclassified it as a member of the new “dwarf planet” category (and specifically as a plutoid).

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