Astronomers have discovered traces of two highly developed extraterrestrial civilizations.

The Kepler space telescope discovered the apparently most Dyson sphere (hypothetical superstructure that allows the use of absolutely all the power already releasing the star). 204278916 Star EPIC, which lies in the constellation Scorpius at a distance of approximately 400 light-years from the sun, blinking so strangely that astronomers cannot find a reasonable explanation. And so I believe that, beyond this star, there is apparently built a gigantic alien structure that periodically eclipses it – something like the Dyson sphere.
204278916 EPIC is already the second star, near which traces were discovered that could leave a highly developed civilization here. Last year, a similar phenomenon was observed in the star KIC 8462852, which is in the constellation Cygnus at a distance of 1,480 light-years, and is not visible to the naked eye.
Kepler telescope finds Earth-sized planet. It monitors variations in the brightness of stars, based on which astronomers can determine whether and how far they care about the body orbiting a planet. The EPIC star 204278916 Kepler began investigating in August 2014 – after it was repaired and filmed elsewhere in the universe on a new mission called K2.
Kepler observed EPIC 204278916 for 79 days, while its flash for 25 days decreased by 35%. A planet in its vicinity would not cause such a strong anomaly. The star must hide something really solid, like the Dyson sphere.