Blazing Speed: The Fastest Stuff in the Universe: "If you're light, it's fairly easy to travel at your own speed—that is to say 186,282 miles per second or 299,800 kilometers per second. But if you are matter, then it's another matter altogether."

"Among thee speed demons of the universe are Jupiter-sized blobs of hot gas embedded in streams of material ejected from hyperactive galaxies known as blazars. Last week at a meeting here of the American Astronomical Society, scientists announced they had measured blobs in blazar jets screaming through space at 99.9 percent of light-speed."