Latest observations have shown that in case alien civilizations are broadcasting from around an oddly behaving star, they aren't chatting loud enough that it is audible to humans from Earth.

In October, the star KIC 8462852 gained a lot of attention when scientists made an announcement that the star has shown proof of periodically dimming by 20% or more, which as per some people could be a result of the shadow of an alien megastructure.

But researchers at the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, California, observed KIC 8462852 and have so far been able to pick up no radio signals that may indicate extraterrestrial chatter.

In a statement, SETI Institute astronomer Seth Shostak said, "History of astronomy tells that, every time we thought we had found phenomenon due to activities of extraterrestrials, we were wrong. But although it's quite likely this star's strange behavior is due to nature, not aliens, it's only prudent to check things out".

The Kepler Space Telescope hunt for planets surrounding distant stars by searching for drops in the brightness of stars that may have been formed when orbiting planets pass in front of them. Astronomers have been observing KIC 8462852 and have found that the star was dimming in a very peculiar way, which was not like the smooth, normal dimming that would be shown by a planet.

Numerous explanations have been proposed, like the existence of a swarm of comets that orbit the star, lying nearly 1,400 light-years from Earth. However, what grasped the attention of the public was the idea that the Kepler- studied star could host a group of alien mega-structures in orbit, created by technologically advanced civilizations.