Undeniably one of the most famous scientists in the United States, astrophysicist Neil deGrasse Tyson is an avowed geek who's calculated the weight of Thor's hammer and even helped Superman to locate Krypton. However, he's also well known (if not exactly loved) for poking holes in the science depicted in popular films. He continued that tradition on "The Late Show with Stephen Colbert," where he offered his assessment of "Guardians of the Galaxy Vol. 2" and the upcoming "Alien: Covenant."

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"There is no sensible space mission that is going to send humans to a planet before we send robots," he said of the Ridley Scott "Aliens" prequel, "because if anything's going to do some killing, they'll kill the robots first and not the people. That'll tell us, 'Let's try a different planet.' So, I don't know what they're doing there."

For "Guardians of the Galaxy Vol. 2," Tyson was a little more willing to ignore logic, although he did point out that there's no sound in space. "In 'Guardians of the Galaxy,' it would be silent movie for all the scenes in space," he said.

"I used to lose sleep over this," he continued, "and then I realized, if there's enough other interesting things going on in a big-budget epic sci-fi film, then you can distract me from all of the science you're getting wrong. So ... a walking, talking tree, a raccoon that will insult you, a green woman -- OK, we're there. Do what you want, I'll just sit back and watch."

Written and directed by James Gunn, "Guardians of the Galaxy Vol. 2" is playing in theaters worldwide. Director Ridley Scott's "Alien: Covenant" opens May 19.