After a drink or two, having sex is a natural inclination. Will the lack of gravity be a problem? (It could lead to some interesting "positions"). A trip to even one of our closest stars would take decades and possibly even hundreds of years, spanning multiple generations.

But scientists aren’t sure humans can procreate safely in the microgravity of space. So far, humans haven’t managed to send a probe beyond even our own solar system, let alone to the nearest star more than 4 light-years away. A light-year, the distance light travels in a single year, is about 6 trillion miles.
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During the STS-80 mission, which was launched on November 19, 1996, the Space Shuttle Columbia took a crew of five astronauts on an 18 day trip around the Earth, the longest flight in the history of the shuttle. During the flight, astronaut Story Musgrave looked out the shuttle windows and saw a large, disc-shaped object. After years of silence, he’s finally started talking about it. The UFO was large–between 50 and 150 feet in diameter–and the outer rim was rotating in a counter-clockwise direction. During the incident, Musgrave said, "I don’t know what it is. Whether it’s a washer, debris, ice particles, I don’t know. But it’s characteristic of the thousands of things which I’ve seen. What is not so characteristic is it appears to come from more