The solar system is a really big place, and it takes forever to travel from world to world with traditional chemical rockets. But one technique developed back in the 1960s might provide a way to shorten our travel times dramatically: nuclear rockets.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/earthtomarsi.jpg)
Source:
https://phys.org/news/2019-07-earth-mars-days-power-nuclear.html