If you wanted to search for aliens, you might look into space for regular broadcast signals similar to what we create on Earth. In 1967, a radio source emitting regular, 0.04-second long pulses every 1.3373 seconds was found for the first time using a scintillation array. Instead, it turned out to be radio emissions from a pulsar, PSR B1919+21, the first one ever identified as such. In binary orbits, we’ve seen pulsars precess where they become invisible and then visible again. Mostly Mute Monday tells the story of a single astronomical phenomenon or object in visuals and no more than 200 words.

Source: Forbes November 28, 2016 15:40 UTC