What Would an Alien Megastructure Look Like?

A diagram of a Dyson sphere as one might be constructed in our solar system

By Elizabeth Howell
Space.com
10-28-15

      A star is dimming for reasons that astronomers can't explain.

Observations by NASA's Kepler space telescope revealed that the star KIC 8462852, which lies about 1,500 light-years from Earth, dimmed dramatically and strangely several times over the past few years. Researchers aren't sure what's going on, and they have posited that some sort of light-blocking "alien megastructure" is a possible — though unlikely — explanation.

Astronomers are following up on that possibility, using radio telescopes to hunt for signals coming from KIC 8462852. But these scientists are urging skepticism on the alien-life hypothesis — as are science-fiction writers.

A star is dimming for reasons that astronomers can't explain.

Observations by NASA's Kepler space telescope revealed that the star KIC 8462852, which lies about 1,500 light-years from Earth, dimmed dramatically and strangely several times over the past few years. Researchers aren't sure what's going on, and they have posited that some sort of light-blocking "alien megastructure" is a possible — though unlikely — explanation.

Astronomers are following up on that possibility, using radio telescopes to hunt for signals coming from KIC 8462852. But these scientists are urging skepticism on the alien-life hypothesis — as are science-fiction writers. [...]

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