星际旅行 IV：太阳帆、磁帆与定向能帆

本文是星际旅行系列的第四篇，探讨了太阳帆、磁帆和定向能推进技术。这些技术被认为是目前在人类寿命内抵达其他恒星系统最可行的方法。

In our fourth installment in the Interstellar Travel series, we'll examine solar sails, magnetosails, and directed-energy propulsion (DEP), which are currently the most plausible methods for reaching another star system within a human lifetime.