A group of physicists from various universities in the United States have collaborated on a new paper. The paper discussed the possibility of using the Laser Interferometer Gravitational Wave Observatory (LIGO) to look for evidence of aliens piloting massive spacecraft around the Milky Way. Their paper is available on the arXiv preprint server.
Astrophysicists and sci-fi fans have grown increasingly frustrated with humanity’s inability to detect the presence of life anywhere in the universe other than planet Earth over the last several decades. Scientists have observed that based on the billions of planets discovered in habitable zones throughout the universe, there should be life elsewhere as well.
The problem is that scientists have yet to find even a speck of evidence for it. Prominent scientists are increasingly calling for new and exotic methods of searching. This problem is now known as the Fermi paradox.
The researchers note that science has advanced to the point where gravity waves can be detected by technology like LIGO. They said that it’s not out of the question that aliens piloting spacecraft could leave gravity waves in their wake that could be detected here on Earth using such technology.
The researchers were intrigued by their own idea. They imagined the factors that might be involved for such a scenario to unfold. They began by considering the size of such a craft. They discovered that it would have to be extremely large to generate gravity waves powerful enough to reach Earth.
It would also have to be moving very quickly. Their calculations indicated that it was moving at about 1/10 the speed of light. It would also have to be relatively close, like 326,000 light-years away from Earth. They note that if such conditions arise, researchers at LIGO should be able to detect the resulting gravity waves.
Even if aliens use warp drives, scientists on Earth should be able to detect them using the same technology. Because these types of crafts would generate gravity waves.
More information: Luke Sellers et al, Searching for Intelligent Life in Gravitational Wave Signals Part I: Present Capabilities and Future Horizons, arXiv (2022). DOI: 10.48550/arxiv.2212.02065