By Mark Gallaway, University of Hertfordshire
The group of Russian astronomers spotted something unusual. They were observing the rather innocuous star HD 164595, located in the constellation of Hercules 94 light years (or about 900 trillion kilometres) from Earth. It’s a sun-like star of a similar age to the Sun and is known to have at least one large planet orbiting it. So it was with some surprise that the astronomers at the RATAN-600 radio telescope, located in Zelenchukskaya and led by Nikolay Bursov, received a short but loud radio burst from the direction of HD 164595.
News of the signal broke in mid August this year – even though it was originally picked up on May 15 2015. Given the possible origin of the radio signal, its frequency, and the signal strength there has been much speculation about what the source could be, including the possibility that it is a beacon signal from an advanced alien civilisation.








