Question

Can the following planets and moons support liquid water? Why or why not?
Mercury
Venus
Earth's moon
Mars
Jupiter
Jupiter's moon Europa
Jupiter's moon Ganymede
Saturn
Pluto

Answer 1

I have hunches, but I can't really explain why or why not that much.
Mercury:No, too hot or too cold
Venus:No, too hot
Earth's moon: No, too hot or too cold
Mars: No, too cold
Jupiter: Yes (I can't really explain why in an "acceptable" way
Jupiter's moon Europa: Yes, suspected oceans buried underneath the surface (I don't know if that's a good enough why)
Jupiter's moon Ganymede: No, can't explain
Saturn: Yes, astronomers think there is water there, too. (I don't know if this is a good enough why, either)
Pluto: I don't know.

Answer 2

People have been debating these things for ages, this is a rudimentary and foolish question to be asking people such that they just say, "This is the answer." I mean, come on? What happened to philosophy?

Answer 3

But yeah, if we want to get technical, mercury is closer than venus, and must be hotter. The moon is so small its gravitational pull can't contain gasses to stay warm, and pluto is so far out, it can't get enough heat from the sun to stay warm.