Artist's illustration showing a star behind a shattered comet. A faraway star's mysterous dimming was most likely caused by comets, a new study suggests — though it doesn't rule out the ...

Avebury is one of the largest prehistoric monuments ever built in Britain. Massive stones, giant earthworks and mysterious ...

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A team of more than 200 researchers, including Penn State Department of Astronomy and Astrophysics Assistant Professor Jason Wright and led by Louisiana State University's Tabetha Boyajian, is one ...

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 ...

How do you explain an outer space discovery that confounds even astronomers? Blame it on aliens. At least that often seems to be the first reaction when such mysteries arise. KIC 8462852 was first ...

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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 ...

A strange star located 1,500 light-years from Earth is exhibiting strange flickering behavior that’s leading some scientists to speculate that an alien megastructure is blocking the light. But what ...

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 ...