what is its size?
Its surface area is , or roughly the same surface area as Russia.
Pluto
 Its surface area is , or roughly the same surface area as Russia. Its surface gravity is 0.063 "g" (compared to 1 "g" for Earth and 0.17 "g" for the Moon).
what is pluto? A dwarf planet in the Kuiper belt. who discovered it? Clyde Tombaugh when? 1930 what is its origin? One early hypothesis was that Pluto was an escaped moon of Neptune. what is its mass? 17.7% that of the Moon.
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Pluto [SEP] Mass and size
Pluto's diameter is and its mass is , 17.7% that of the Moon (0.22% that of Earth). Its surface area is , or roughly the same surface area as Russia. Its surface gravity is 0.063 "g" (compared to 1 "g" for Earth and 0.17 "g" for the Moon). The discovery of Pluto's satellite Charon in 1978 enabled a determination of the mass of the Pluto–Charon system by application of Newton's formulation of Kepler's third law. Observations of Pluto in occultation with Charon allowed scientists to establish Pluto's diameter more accurately, whereas the invention of adaptive optics allowed them to determine its shape more accurately.