Why was Pluto demoted from planet to dwarf planet?
A. It does not orbit the Sun.
B. It did not have enough formation heat to completely melt, and enough gravity to round itself into a spherical shape.
C. It did not clear out its orbit.
D. (All of the above choices (A)-(C).)
Answer:C
Why was Pluto demoted from planet to dwarf planet?
A. It does not orbit the Sun. B. It did not have enough formation heat to completely melt, and enough gravity to round itself into a spherical shape. C. It did not clear out its orbit. D. (All of the above choices (A)-(C).)