When one day the sun expands and the Earth becomes uninhabitable, we will be able to fly to a new home in a spaceship, Space X founder Elon Musk wrote about this in an article for the Chinese magazine China Cyberspace, commenting on the prospect of colonizing Mars.

If humans can inhabit other planets, it means that they have passed one of the conditions of the great elimination of the universe, then they will become interplanetary citizens, and human civilization can continue to exist.

The first step toward an interplanetary habitat is to lower the cost of travel, which is what SpaceX was created to do, first by creating reusable rockets and then reusable mega-ships with ever-increasing payload capacity. As of early this year, SpaceX has successfully reused 79 rockets to deliver cargo to the space station and send ordinary people into space.

Musk says they have designed and built the largest Starship launch vehicle in history, which can carry 100 passengers and supplies at a time. In the future, they plan to build at least 1,000 Starships to send groups of pioneers to Mars to build a self-sustaining city.

As technology continues to change life at an ever-increasing rate and the world evolves, life is about more than just solving one problem after another. What people want is to wake up in the morning full of anticipation of the future and to be excited about what is to come. Hopefully more people will join in the  struggle to accelerate the world's transition to sustainable energy. Musk also invites like-minded Chinese partners to join us in exploring clean energy, artificial intelligence, human-machine cooperation and space exploration to create a future worth waiting for, he said.