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So when I was younger I got a series of books involving an astronomer with Kung fu abilities who discovers a rogue object orbiting Jupiter. Next, he and his team figure out that it has left Jupiter's orbit and is on a course to intercept Earth. In there somewhere is some Russian espionage, the astronomer seduces his intern, and then by the end of the first book the plan is to send the astronomer into orbit to check out the alien spaceship that is now orbiting Earth (I believe the spacecraft was specifically egg shaped and golden). He gets inside and everyone thinks that he dies when he runs out of oxygen, but there were three books I believe and in the second one they recover his body and it turns out that somehow he got self-replicating nanobots into his bloodstream that continuously repair his organs, to the point where he no longer needs to eat or sleep. It's been some time since I read this series, but I'd like to reread them if only I could remember what they were called or even just the author's name.