I don't think there's anywhere else to go off planet
As I said, we're doing really badly at it!
We're getting there slowly though... We have people at the international space station on a permanent basis - they're off planet, literally. We've sent humans to the moon and operational robots to Mars.
That's hugely nearer than we were 100 year ago, and considering the exponential rate of technology, it shouldn't take a whole lot longer.
When we see Mars in the night sky, DS often remarks on how he'll go there one day. That would have been fantasy for me at the same age, but it's perfectly possible he will.
Elon Musk, for example, is aiming for a Mars colony by the end of the next decade. The first people could be there as soon as 2024.
Many plans for a Mars settlement expect a community in matters of decades. The United Arab Emirates aims for a city of 600,000 by 2117. Astrobiologist Lewis Dartnell [sadi] “while the first human mission to land on Mars will likely take place in the next two decades, it will probably be more like 50-100 years before substantial numbers of people have moved to Mars to live in self-sustaining towns.”
SpaceX is aiming for a much, much faster timeframe. Here’s how it looks:
SpaceX’s Mars Plan: 2019
The company is set to hold the first “hop tests” for its Mars-bound Starship in this year, seeing if the rocket can jump a few hundred kilometers.
2020
More tests
2022
This could be the first year that SpaceX reaches Mars. (Unmanned)
“I feel fairly confident that we can complete the ship and prepare the ship for launch in about five years,” he said. “Five years feels like a long time to me.”
The ships would place power, mining and life support infrastructure for future flights. They would also confirm water resources and identify hazards.
2023
SpaceX passengers on trip around the moon.
2024
The plan is to send two cargo ships, alongside two crew ships taking the first people to Mars. They will be tasked with setting up a propellant production plant, combining Martian water, ice, and carbon dioxide to create methane and liquid oxygen to fuel the ships and come back home. The humans would be tasked with collecting one tonne of ice every day to fuel the plant.
In short, it’s not going to be a leisurely visit. Musk stated at the South by Southwest Festival in Austin, Texas in March this year, that Mars and the moon “are often thought of as some escape hatch for rich people, but it won’t be that at all.”
2025
This is the earliest point at which Musk thinks a Mars colony could take shape. He has predicted a timeframe of “7 to 10 years” before the first bases take shape.
This will expand on the work left behind by the first humans. Paul Wooster, principal Mars development engineer for SpaceX, explained that “the idea would be to expand out, start off not just with an outpost, but grow into a larger base, not just like there are in Antarctica, but really a village, a town, growing into a city and then multiple cities on Mars.” The larger cities would offer habitats, greenhouses, life support, and enable new experiments that help to answer some of the big questions about life on Mars.
SpaceX’s Mars Plan: Beyond
By the end of the next decade, SpaceX expects to have some sort of settlement on Mars. Musk has said there’s a 70 percent chance he’ll visit Mars himself in his lifetime, perhaps paying a visit to this developing colony. That is, depending on how the first settlements go — Musk said in 2016 that “probably people will die,” but “ultimately, it will be very safe to go to Mars, and it will be very comfortable.”
From this article
www.inverse.com/article/51291-spacex-here-s-the-timeline-for-getting-to-mars-and-starting-a-colony