Pluto: The New Dwarf Planet (Fact of the Day)

Artist's conception of Pluto (to the right) and its moon Charon (to the left)

Pluto was the ninth planet in our solar system but was later reclassified as a dwarf planet and was given the number 134340. Now, it is the second-most-massive 'dwarf planet' in our solar system. It has a reddish-brown colour and is primarily composed of rocks and ice with traces of Methane, Nitrogen and Carbon dioxide. The surface temperature of Pluto is about 44 K. It has a mass which is one fifth the mass of our own moon. It has a highly eccentric orbit and takes 248 years to orbit the sun and it occasionally appears closer to the sun than Neptune due to it's orbital eccentricity.  It has four moons and the moon Charon is the largest of them all, which is about half the size of Pluto itself. 

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