Interstellar travel sounds impossible at this point for anyone who’s at least a bit interested in astronomy. But Irina Romanovskaya, who’s a Professor of Physics and Astronomy at Houston Community College, believes that it could be possible. Furthermore, she even believes that a spaceship might not be necessary to get the job done.
There are over 4.3 light-years separating our solar system from the closest one, which is known as Alpha Centauri. Judging by the tools astronomers currently have, it would be impossible to travel such a distance in a human lifespan. However, we should think more about the big picture, meaning that we might not be alone in the Universe. Astronomers always had this hunch or even strong belief, although there’s no irrefutable evidence for the existence of aliens yet. And those hypothetical remote alien civilizations might have found an incredible way to travel between stars.
Using rogue planets instead of spaceships?
Intelligent civilizations such as us or those that might exist on other planets could use rogue planets to go from one star system to another, according to Romanovskaya’s view.
The scientist stated:
I propose that extraterrestrial civilizations may use free-floating planets as interstellar transportation to reach, explore, and colonize planetary systems,
I propose possible technosignatures and artifacts that may be produced by extraterrestrial civilizations using free-floating planets for interstellar migration and interstellar colonization, as well as strategies for the search for their technosignatures and artifacts.
Rogue planets are those planets that aren’t attached to any solar system. Their unusual condition has several possible explanations. Those planets might have been “kicked out” of their solar systems or represent the outcome of a gas cloud’s collapse that was too small to form a star. Therefore, rogue planets fly freely through space, which is why they can also be called free-floating planets.
The new study was published in the International Journal of Astrobiology.