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Pluto, Charon (just below and to the right of Pluto), and the tiny moons Nix and Hydra were imaged by the Hubble Space Telescope. ... Pluto in Brief; Tiny, cold and incredibly distant, Pluto was discovered in 1930 and long considered to be the ninth planet. But after the discoveries of similar intriguing worlds even...
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solarsystem.nasa.gov/planets/profile.cfm?Object=Pluto
solarsystem.nasa.gov/planets/profile.cfm?Object=Pluto
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Pluto - Wikipedia, the free encyclopedia
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Pluto , formal designation 134340 Pluto , is the second-largest known dwarf planet in the Solar System (after Eris) and the tenth-largest body observed directly orbiting the Sun. Classified as a pl...
en.wikipedia.org/wiki/Pluto
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The IAU has changed the definition of "planet" so that Pluto no longer qualifies. There are now officially only eight planets in our solar system. Of course this change in terminology does not affect what's actually out there.
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Pluto/Earth Comparison ... Pluto Observational Parameters ... Pluto Mean Orbital Elements (J2000)
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nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html
nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html
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NSSDC Lunar & Planetary Science: Pluto Page ... Missions to Pluto ... The IAU has redefined Pluto as a "plutoid", a class which also includes the large Kuiper Belt Object Eris. See the IAU Press Release.
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nssdc.gsfc.nasa.gov/planetary/planets/plutopage.html
nssdc.gsfc.nasa.gov/planetary/planets/plutopage.html
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Pluto, which was discovered in 1930, is but a dot of light in even the largest Earth-based telescopes. Pluto is 2/3 the size of Earth's moon but 1,200 times farther away, which makes viewing surface detail as difficult as trying to read the printing on a golf ball located thirty-three miles away (more info).
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csep10.phys.utk.edu/astr161/lect/pluto/pluto.html
csep10.phys.utk.edu/astr161/lect/pluto/pluto.html
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