Which is a unique feature of Pluto's satellite, Charon, standing out from most other satellites?
a. has an atmosphere
b. tidally locked to Pluto
c. mostly composed of rock
d. its surface is composed of methane ice
e. orbits in the plane of Pluto's equator
Question 2
Which of these celestial bodies is rocky with a thin atmosphere?
a. Ceres
b. Eris
c. Neptune
d. Uranus
e. Pluto