With dreams of Mars on the minds of both NASA and Elon Musk, long-distance crewed missions through space are coming. But you might be surprised to learn that modern rockets don’t go all that much faster than the rockets of the past.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/2-tosafelyexpl.jpg)
Source:
https://phys.org/news/2020-05-safely-explore-solar-spaceships-fasternuclear-powered.html