If there ever was an alien megastructure orbiting Tabby’s Star, it has long since crumbled to dust. The dips in the weird star’s light are almost definitely caused by a ring of dust, not a huge opaque ...

The “alien megastructure” star that has been puzzling us for the past few years might have a more ordinary explanation: an orbiting Saturn-like planet, complete with wobbling rings. In 2015, a group ...

Let's just call it the alien megastructure that wasn't. More than 100 researchers have released a study showing that the mysterious star KIC 8462852, better known as Tabby's Star, is almost certainly ...

(To get an idea of how big that is, about the 455 United States, lengthwise, could fit inside this alien megastructure.) Any structure built around this star would have to be quite large to block the ...

This illustration shows a star behind a shattered comet. (Credit: NASA / JPL-Caltech) That mysterious “alien megastructure” star is still a mystery, but the most plausible explanations appear to be ...

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Tabby's Star, a mysterious dimming star that has puzzled astronomers so completely that the wildest of explanations for its behavior have been proposed, turns out to be a natural astronomical ...

The mystery of why a distant star keeps dimming continues to baffle scientists, after a new report ruled out several "natural" explanations. The astronomical world lit up last year, after planet ...

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The discovery, published in Nature Geoscience, reveals one of the largest deep-Earth structures ever mapped on the continent.

Add Yahoo as a preferred source to see more of our stories on Google. Archaeologists in Romania have uncovered portions of an ancient megastructure from around 6,200 years ago. The oak-floor building ...