This kind of travel has been technically possible since before you and I were born.
The engineering, design, and testing were completed before Kenedy was assassinated.
We opted to go to the moon instead, for political reasons.
We have the means to conquer the solar system now
We've been sitting on it for decades
The ability to build a spaceship that can carry hundreds of crewmen into space, and
use up the world's nuclear arsenal in a peaceful purpose.
Personally, I think that we may have one sitting, ready to launch, somewhere today.
It's no more expensive than an aircraft carrier to build, and we have ten of those in service now.https://youtu.be/4dLFupKrjGg