Freddy Flyaway Returns

Freddy Flyaway has returned from his reconnaissance of the solar system, after developing a superfast spaceship so that he could complete the journey in a matter of a few months. He has invited you to his presentation of his adventure. He has a slideshow in which he presents many pictures of the various planets, describes the design of his special spacecraft, gives a long, agonizing description of how he came to embark on such a journey, and provides rock samples from each of the nine planets. (Nobody told Freddy that Pluto was no longer a planet.) Why do you doubt the validity of Freddy's presentation?

Answer:

The four big planets, Jupiter, Saturn, Neptune, Uranus, are gas giants. If they do happen to have a solid core deep inside, Freddy would have had to burrow through thousands-of-mile deep atmospheres to reach them and try to collect his rock samples under the intense pressure that would result. Not too likely!