Maybe an exploration vessel could go a little beyond our solar system, but it will definitely will not make a trip back. Wowever I see as an implaussible thing that we will reach another planet OUT of our solar system. ...Unless we get to createm control and use Einstein-Rosen bridges..curono
By definition an ERB is non-traversable.
@HoolaHoopMan: I'm sure that in 100 years many unforeseen advances could arise, but fundamental physics really hasn't changed in ways that people seem to think. Yes, Einstein replaced Newton, but in terms of what the equations say about the motion of the planets, or getting from point A to B didn't change much.
To get a human being out of the solar system would either require building and fueling on a scale that is almost inconceivable now for literally NO return on investment, or perfection of human hibernation/stasis. In the former case, the amount of air, water, food, etc... to get ONE human out of the solar system would be VAST. You would need novel ways to shield from interstellar radiation, and either materials that can withstand tremendous impacts, or the development of star trek -esque shielding. All of that would require energy and maintenance, and so forth.
The idea that sending a handful of people in a capsule .0024 AU a handful of times even RELATES to the challenges of extra-solar travel (or even travel beyond the inner planets) is almost insane.
The "cheat" used by many here is to assume that time needs to be reduced for the journey, and that means getting as close to 'c' (light speed) as possible. What seems to escape these people is that interstellar dust moving relative to a craft at a respectable fraction of 'c' hits HARD. A pebble would hit like a ******g truck, and you would lose all communications with Earth. In addition, if the craft is long enough, and the speed is fast enough you would have Relativistic effect between ends of the craft.
For those who think we'll pop through wormholes, or discover a warp drive... remember, you're also saying, "We will perfect time travel, and eliminate causality." Unless your wormhole or drive can only go in ONE direction, it's a time machine (in the sense of travel to the past). You wouldn't just be overturning SR/GR and QM... you'd be going against observations of 13 billion years that indicate a CONSTANT thermodynamic arrow of time that does NOT reverse. You would have to engage in paradox, and you'd have to explain why we haven't met any time travelers.
Before the next poster wipes all of that away with, "you never know"... at least ACKNOWLEDGE what the aspirations and claims here mean. It's not about current human knowledge, but the large and small scale structures of the universe. It's about why cups fall and break every time, and they never un-break themselves, if you catch my drift. If you think people are going to find a way to functionally bypass causality, you might as well just say that you think god will give us a magic space-chariot.
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