Simulating gravity by spinning the carrier capsule would solve the bone problem, but there’s still a mess of other issues in travel such as dealing with radiation.
If we ever were to reach another planet I see very little chance of a human survival/procreation on it. We would have to hit a billion to one lottery that the planet has nearly identical atmospheric composition as ours.
Terraforming Mars might be the best option for leaving earth but something like that would take quite a long time.
“Terraforming Mars might be the best option for leaving earth but something like that would take quite a long time.”
Not if the machines are self building and dismantling...
Basically imagine sending one robot to a planet that starts to mine, refine and construct other robots from the raw materials in that planet’s soil.
Then various specialized robots fill the planet and alter the composition of the soil and the atmosphere until the ideal environment is achieved. Then they dismantle themselves into useful structures for humans, start growing food and we begin to arrive!