Re: Ufo Threads
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"It's a diffuse signal coming from all directions, so it is not caused by any one single object," said Al Kogut, who headed the ARCADE team at NASA's Goddard Space Flight Center (opens in new tab) in Greenbelt, Maryland. "The signal also has a frequency spectrum, or 'color,' that is similar to radio emission from our own Milky Way galaxy (opens in new tab)."
Scientists call the signal "radio synchrotron background" — background being an emission from many individual sources and blending together into a diffuse glow. But because the "space roar" is caused by synchrotron radiation, a type of emission from high-energy charged particles in magnetic fields, and because every source has the same characteristic spectrum, pinpointing the origin of this intense signal is difficult.
"It has been known since the late 1960s that the combined radio emission from distant galaxies should form a diffuse radio background coming from all directions," Kogut told All About Space in an email. "The space roar is similar to this expected signal, but there doesn't seem to be six-times more galaxies in the distant universe to make up the difference, which could point to something new and exciting as the source."