Why Will Astronauts Probably Never Set Foot on Any of the Giant

Multiple Choice

Why will astronauts probably never set foot on any of the Giant Planets?

A) These planets have no solid surfaces for them to land on.
B) Their clouds are so hot that any spacecraft getting near it would burn up.
C) Their gravitational attraction is so weak that they would float off.
D) Astronauts will land on the Giant Planets-the idea is perfectly reasonable.