Shorter transit times to Mars are a result of NTP systems’ increased efficiency. A one-way journey to Mars using current chemical propulsion methods takes roughly six to nine months. On the other hand ...

On 12 February, Musk posted a tweet that said, "Welcome to Mars." The post included a futuristic video showing a Mars colony. It featured spacecraft, tall buildings, and an advanced cityscape.

NASA just greenlit the study of several futuristic tech concepts, including one that could let you breathe on Mars. The projects are part of the NASA Innovative Advanced Concepts program.