Shields up! How spaceships can save themselves without science fiction

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This post is part of Science of Sci-Fi, Mashable‘s ongoing series dissecting the science (or lack of science) in our favorite sci-fi movies, TV shows, and books.

Thanks to fictional depictions, we tend to think of spaceships as well-fortified machines. But in reality, even in the emptiness of outer space, their hulls would be under threat of bombardment from near-invisible enemies. 

In the Star Wars and Star Trek franchises, ships are usually fitted with deflector shields — zones of energy that absorbed beams of enemy fire. The USS Enterprise, for example, could repel an enemy’s colorful phaser blasts by putting its shields up. To increase dramatic tension, those shields generally didn’t hold up for long.  Read more…

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