On Wednesday afternoon, the European Space Agency made galactic history when their Rosetta Mission successful landed its Philae probe on a speeding comet, the first time such an extraordinary feat has been achieved.

As with everything from the moon landing to the death of Elvis, an alternative version of “what really happened” as the Philae probe landed on comet 67P did not take long to emerge.

According to an email published on the website UFOSightingsDaily.com – which does a regular trade in alien sightings – this mission is part of a European Space Agency and Nasa cover-up to disguise the comet’s true alien nature. The email, allegedly from a secret whistle-blowing employee of the ESA, accuses the agency of “blatant cover-ups” in wanting to land on the speeding comet and attaches photos which claim to reveal the “true inner workings of Comet 67P”.

It states: “Do not think for ONE MOMENT that a space agency would suddenly decide to spend billions of dollars to build and send a spacecraft on a 12-year journey to simply take some close-up images of a randomly picked out comet floating in space.”

“Comet 67P is NOT a comet,” the letter continues. “Some 20 years ago Nasa began detecting radio bursts from an unknown origin out in space. It would later be known that these had likely come from the direction of the now named comet 67P. It does show signs on its outside of machine like parts and unnatural terrain.”

Ending on an ominous note, it adds: “Whatever this object is, it did not ask to be found or scrutinised.”

Commenting on the article, contributor Scott Waring also said he believed the signals being emitted from the comet were a “greeting” to humans. “If it was a warning, they would not allow the ESA craft to have landed” he wrote. “I believe the landing of the ESA craft was the equivalent of a first handshake. They will make another move soon probably. Alien structures are on the comet. I don’t believe it’s natural. ”

Yet this is far from the only extra-terrestrial conspiracy theory put forward about 67P and the ESA mission. In September, BPEarthWatch published a video showing “brand new, hi-res” images. Taken from the Rosetta spacecraft, they appeared to show two UFOs flying over the comet and a transmission tower-like structure built on the surface, potentially emitting the mysterious radio signals which have been picked by the ESA. “These images are not normal,” says the video voiceover.

ESA’s confirmation that the comet had been emitting a “mystery song” has fuelled theories that it is in fact an alien ship and the warbling is an extra-terrestrial attempt at communication.

Writing on the website UFOSightingsDaily.com, Scott Waring professed that: “In my opinion this is not a code. It is how a species of aliens communicate to one another without speaking. A form of telepathy put into primitive radio signals. Its the only way this species can communicate to us. This is their thoughts. They don’t talk.”

Waring added: “Getting a copy of the full message and then translating it should be of utter importance. Is it a message of greetings? Or is it a warning of what’s to come? We, the people of the world, need to find out.”