A researcher has come up with an idea for a huge machine that advanced civilisations could use to move their star system around the galaxy – and we might be able to spot one in action
Source:
https://www.newscientist.com/article/2248537-alien-civilisations-could-move-their-star-to-avoid-a-cosmic-disaster/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home