Apparently there may be more planets than you may have realized that astronometrs have seen as potentially inhabitable.  This would be a factor in any interstellar travel:

To date, 3841 planets in the near regions of our galaxy have been identified as potential settlement options, about 1100 of which are confirmed. Most are Jupiter and Neptune-sized planets that orbit close to their corresponding stars. Estimates on the number of Earth-sized planets that could possibly support life in our galaxy fall around nine billion.

A number of proposed spacecraft designs with alternative propulsion methods that have came and went since the 1970’s are cycled through before landing on what is currently the most desired fuel type – antimatter. The engines hypothesized here would supposedly need only 1/10000 of a gram of antimatter to take a spacecraft with all the necessary cargo to Alpha Centauri.

We hope you like the videos yes there are two and always expand your mind!  And feel free to check out the comments or reply with your own!!

https://www.youtube.com/watch?v=dQdRrhDMXnY

thanks to youtube for the info