Houston we have a problem. Something has gone wrong with the Voyager space probe.
It was sent out into space more than 30 years ago to find out more about the solar system, but NASA says the spacecraft has starting sending back data which its computers cannot decipher.
The US space agency says that is probably due to a technical glitch, but UFO spotters say NASA should not rule out the possibility that other factors may be involved.
When Voyager launched in 1977 it was carrying a gold record containing sounds and images of life on Earth, to tell a story of our world to any extra-terrestrial it may encounter.
Some people are saying that day has come.
Last month something went wrong with Voyager's transmissions. Voyager's chief scientist, Edward Stone, says there has been a glitch.
"The voyager spacecraft are controlled by three onboard computers and one of them formats the scientific data that's transmitted back to Earth," he said.
"Somehow the format got garbled, so data wasn't exactly in the order we expected."
NASA's computers on Earth cannot decode that data.
NASA has now reprogrammed Voyager 1 to only send back information about its health and status, while scientists here try to work out what caused the problem.
"This is just a naturally occurring event. It could be a grey particle which hit an electronic bit in the memory and caused it to flip - that happens occasionally. It may be that the part actually failed," Professor Stone said.
But the spokesman for UFO Research New South Wales, Doug Moffat, says there are alternative theories as to what is going on up there.
"It's very intriguing. I mean obviously this Voyager 1 is beyond our solar system I think at the moment," he said.
"So it's the furthest thing away from our planet, so the closest thing to any possible extra-terrestrial life that might be out there.
"Why they would choose to reprogram it and send it back, or what they were saying, is all a mystery."
NASA says that is not possible.
"This is not the first time something like that has happened so it doesn't require any external agent," Professor Stone said.
Part of Voyager's mission is to probe deep space and find out if there is anything else alive out there.
But Professor Stone says the craft is probably not yet far enough away to find alien life.
"You have to realise that as far out as Voyager is, we are just starting on the journey to the nearest star, and it'll be another 40,000 years before we're closer to another star than we are to the sun," he said.
"So the distances are immense and the probability that anything has come here to where Voyager is are very remote.
"In 40,000 years we will be closer to another star than the sun but we will be far, far away from both, so space is empty and so that means it's very unlikely that anything will ever find Voyager."
But Mr Moffat does not believe that.
"I think that is definitely a party line that's being towed there. I think a lot of what NASA says is not the truth," he said.
"It's been well documented footage has been taken by astronauts and things like this. I mean most of this is explained away by ridiculous arguments from NASA, so I don't really take any notice of what a NASA spokesperson says."
But Mr Moffat admits he is not certain the probe has been reprogrammed by extra-terrestrials.
"I couldn't say. It's more likely it may well be some sort of technical issue," he said.
"I think that what's important is that people are looking at alternatives and rather than dismissing alternatives such as extra-terrestrial life interacting with us in some way, it's being left on the table as a possibility."
NASA says the Voyager spacecraft will continue to orbit the galaxy for billions of years to come.http://www.abc.net.au/news/stories/2010/05/14/2899994.htm