Astronomers have recently observed what some claimed to possibly be an alien megastructure orbiting a distant star.
After directing the NASA’s Spitzer Telescope on Tabby Star (or KIC 8462852) the space scientists have been puzzled when they observed some unknown object orbiting around it in a strange way that nobody ever seen before.
One of the hypotheses emerging after the great discovery was that the unidentified orbiter could be a Dyson-sphere, an alien-made megastructure build to harness energy from the star by a very advanced civilization. Jason Wright, astronomer at Penn State University claimed that is something we could expect a developed alien civilization to build.
Now Massimo Marengo from Iowa State University ruined the enthusiasm claiming that the mysterious object could be just an orbiting comet that drags debris behind it or a family of comets. He claims that a collision of more comets could have created a huge cloud that could dim the light of the star.
NASA claims that couldn’t be a plausible explanation given the fact that no traces of hot activity could be seen with the infrared camera. Though, they also believe it was a comet or a group of comets on an irregular orbit that passed in front of the star and caused the mysterious light dimming.
However, this is just another hypotheses and NASA is planning on doing some more elaborate investigations. Until more concrete data will be found, astronomers aren’t yet ready to dismiss the megastructure speculation. One of the scientists who still believes there might be an advanced civilization in the Solar System of Tobby’s Star is the director of SETI (Search for Extraterrestrial Intelligence Institute), Seth Shostak.
What made people believe there isn’t a planet that causes the dims in the light of Tobby’s Star was the deep dims and the random change of the star’s brightness, varying from days to months. This was the first time when the astronomers have witnessed something like that. It was very different from the other over 150,000 stars from Kepler’s database.
Tobby’s Star is at a distance of 1,480 light years from our planet. That means that if a spaceship would travel with the speed of light it would take it 1,480 years to get there. Unfortunately, there are very small chances of meeting the megastructure’s builders in our lifetime.
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