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Just to give you a scale of size, going to speed of light, 180k miles per second, crossing just our Galaxy would take about 120,000 years! Mind bogging! Our closet neighbor the Andromeda galaxy is around 2.5 million light years away from us. I want so badly to be able to one day have the tech to do. The bad thing is, anyone who travels to one with technology that doesnt even exist yet, would leave behind all they know due to time dialion under the theory of special relativity. Sorry for rambling! Haha