"They are signals that left the Earth about 50 years ago and have bounced off an object or more likely a field of objects some 25 light years away".
"...we asked NASA if they could point Hubble at the center of what we've named the 'Bounce Anomaly'. NASA were very keen to help once they had seen our data." However the $3 billion space telescope was unable to produce any clues as to what the signals are bouncing off.
Easy. Its an invisible space condom keeping bad TV from infecting other solar systems. DUH!