Quotes: All Planets Are Earth-Like
Guy Fleegman: Hey! Don't open that! It's an alien planet! Is there air? You don't know! Fred Kwan:
[sniffs air] Seems okay.
"There are two ways to look at it. Given the vastness of the universe, it is highly probable that a close twin of Earth would exist somewhere; therefore, the mere existence of such a planet should not take us aback. On the other hand, the odds of such a twin turning up only a few thousand parsecs from the original planet... that is frankly unbelievable."
"How can this place exist?" wondered Buster. "The temperature outside should be hundreds of degrees, and the atmospheric pressure ninety times that of Earth!"
"We appear to have entered a realm in which the Laws of Common Sense do not apply," said Proton.
— Captain Proton and the Planet of Lesbians