Proxima Centauri just released a flare so powerful it was visible to the unaided eye
(PHYSorg.com Space & Earth)

Since its discovery was announced in August of 2016, Proxima b has been an endless source of wonder and the target of many scientific studies. In addition to being the closest extra-solar planet to our Solar System, this terrestrial planet also orbits within Proxima Centauri`s circumstellar habitable zone (aka. `Goldilocks Zone`). As a result, scientists have naturally sought to determine if this planet could actually be home to extra-terrestial life.