A team of astronomers from Europe have found an explanation to why we haven’t been visited by aliens yet. They think alien civilizations might really exist, but they could not come and explore our planet and the Solar System. This could have happened because exoplanet gravity was too strong and prevented them from leaving it.
Exoplanet gravity might keep aliens stuck to the ground
Researchers have always been on a quest for alien life. So far, they could find around 2,000 exoplanets, but no trace of aliens. Some of these cosmic bodies weren’t situated in the habitable zone of their governing stars, so they weren’t too friendly to host life. Others were in the habitable zone, but other problems arose.
Some of these planets were much too big, making space exploration impossible. If they are much bigger than Earth, then the exoplanet gravity gets incredibly strong. This will prevent any kind of rocket or spaceship from leaving the ground. One of the researchers involved in the study, Michael Hippke, explained this force would keep anything stuck to the ground.
In fact, this strong exoplanet gravity might place aliens a lot behind us. Even on our planet, lifting a spaceship from the ground and having it reach space is extremely costly, and this is mostly because of gravity. If giant exoplanets have several times our gravity, making powerful rockets would require a lot more resources.
The size of the universe is another important problem
However, exoplanet gravity is not the only problem. Let’s say aliens have managed to develop a technology that’s a lot more advanced than ours. Even so, the universe remains incredibly big. The closest star to the Solar System is Proxima Centauri, 4.3 light-years away from us. If aliens travel at the speed of light, it would take them 4.3 years to get here.
Those exoplanets that lie in habitable zones are even further away. Therefore, exoplanet gravity is the least of the problems when it comes to alien exploration and space travel. Even if these civilizations have developed an advanced technology, we have slim chances to actually see them visiting our planet.
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