A vast orbital megastructure circles Earth in a vision of planet-scale engineering, as this documentary explores bold sci-fi ...

The scientific world lit up last week after stargazers spotted a mysterious object way out in deep space and claimed it was an "alien megastructure". Astronomer Jason Wright from Penn State University ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A star is dimming for reasons that astronomers can't explain. Observations by NASA's Kepler space ...