And conspiracy theorists have jumped on comments said to have been made by a NASA scientist in a series of videos that are doing the rounds online.
Voyager 2 was around 15 billion km from Earth, when the message was sent back.
Voyager 2 was hacked by aliens, claim conspiracy theorists.
“Something or someone changed the communications system of the space probe Voyager 2.”
Voyager 2 has also visited Jupiter and Saturn.
Mr Baines reportedly said subsequent analysis found a component in a binary code system was changed from 0 to 1.