Young stars that are just starting their luminous lives are known to give off massive solar flares that can be many hundreds to thousands of times more powerful than the largest flares on record from our own middle-aged Sun. Juvenile stars burst with these “superflares” on a weekly basis, but
A Canadian physics professor claims that he has uncovered evidence of communication from 234 extraterrestrial civilizations, in the form of signals that are encoded in the emanations of stars much like our own Sun.
In analyzing the composition of the light spectra of 2.5 million stars from the Sloan Digital Sky Survey, optical physics professor Ermanno Borra, of Université Laval in Quebec, found patterns in the form of 1.65 picoseconds pulses (just a little more than a trillionth of a second) that existed in the light of 234 Sun-like stars. Borra posits that only extremely powerful lasers can produce such a rapid pattern, meaning that the signals must be artificial in origin.
A star that goes nova is only supposed to explode once… right?
That long-held assumption was upended when astronomers spotted a Type II-P supernova in progress in a star 509 million light-years away on September 8, 2014. The exploding star in question, iPTF14hls, was predicted to fade within 100 days, but its luminosity not only persisted for the next 600 days, it also flared to an even greater brightness at least five more times, implying that this single star had experienced a supernova at least six times.