In 2006, #NASA attached ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission) to a giant, tethered #balloon and let it up into #space. They were looking for ARCADE to pick up faint #radio signals and early #heat traces from distant #stars. Instead, #scientists heard something they described as a “#boom.” This became known as the “space #roar.” This sound was six times stronger than any #noise they were predicting. Researchers soon determined that the radio emissions of the “space boom” were not from distant stars, but still cannot figure out exactly what caused this intense boom. by curiositydotcom