By Lizzie Smith for MailOnline. And that certainly proved to be the case as Kate Upton posed under zero gravity conditions for a one-off photoshoot for Sports Illustrated's 50th edition. She's out of this world! Kate Upton poses in her tiny gold bikini as she spins around an aircraft in zero gravity conditions on a photoshoot for Sports Illustrated. Her blonde curls swung around her face as the year-old model floated in space - in conditions perfected to allow astronauts to train for their missions.
Sex in space , specifically human sexual activity in the weightlessness of outer space , presents difficulties due to Newton's third law. According to the law, if the couple remain attached, their movements will counter each other. Consequently, their actions will not change their velocity unless they are affected by another, unattached, object.
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