Sort each statement below into the appropriate bin based on whether it is something that scientists knew about Pluto or its moon Charon before the New Horizons flyby, is something learned as a result of the New Horizons flyby, or is something that seems possible from the New Horizons mission but for which we'll need additional data to establish it with certainty.
Known prior to New Horizons mission:
Learned from New Horizons mission:
Possible but not proven from New Horizons mission:

Pluto is less massive than any of the terrestrial planets
Pluto is a member of the Kuiper beltPluto is sometimes nearer to the Sun than Neptune
Pluto has a comet-like composition of ice and rock
Charon has huge, deep canyons
Pluto's thin atmosphere contains haze particles that can fall to the surface
Pluto has tall mountains built of water icePluto has smooth plains of nitrogen ice
Pluto has a subsurface ocean of liquid water
Pluto has active volcanoes