The Mysterious 2006 "Space Roar"
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.
Key Facts In This Video
The ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission) balloon was launched to pick up radio signals in space. (0:24)
The 2006 "space roar" was six times louder than the signals NASA was expecting to pick up. (0:57)
Space is mostly a vacuum, so there is no physical medium for sound to move through. (2:11)