Humanity needs to leave earth and travel to a new home planet. Given that the technology for fusion reactors is available, how fast could they realistically travel?
There are two scenarios I'm interested in:
- Living humans in a spacecraft (in hibernation or on a generation ship)
- No living humans, only cargo with DNA samples
The questions are:
- How much acceleration would be survivable for a human?
- How fast could an spacecraft go without compromising structural integrity?
It appears that nothing above 10% of the speed of light would be realistically doable.