https://www.theregister.co.uk/2019/12/13/objects_in_space/

A hundred red objects blinking in and out of existence across Earth’s skies over the past 70 years have left scientists giddy: they believe this could be evidence of previously unseen astronomical phenomena or – and hold tight, now – alien civilizations.

The objects were scrutinized by the Vanishing & Appearing Sources during a Century of Observations (VASCO) project, led by Stockholm University in Sweden, which is on the lookout for the Milky Way’s weirdest events.