Nasa has poured cold, salty water on excitement that it could be about to announce it had found aliens.

The agency has looked to calm speculation on social media and elsewhere that a press conference is is holding on Monday will be about the discovery of life on Europa, one of Jupiter’s moons.

Excitement kicked off when Nasa said that it would be holding a press conference about the fact that the Hubble Space Telescope had found “surprising evidence of activity” on Europa. Experts have suggested that Europa could be the best place in the solar system to find life – and so speculation immediately jumped to the fact that the activity was aliens.

That excitement flew around social media and eventually made it into the papers, some of which questioned whether Nasa was about to announce that it had found life on the moon.

Finally the space agency posted a tweet of its own that will come as a disappointment for anyone hoping to meet Europa’s aliens. It read: “Monday, we’ll announce new findings from Jupiter’s moon Europa. Spoiler alert: NOT aliens.”

Nasa to hold announcement about ocean on Jupiter’s moon

The discovery is more likely to relate to water vapour “plumes” that Hubble spotted high above the moon in 2012, but which have not been seen again.

If the plumes are shown to be linked to the moon’s sub-surface ocean, it would make the job of investigating the habitable potential of Europa much easier. Instead of having to drill through the moon’s thick, icy shell, scientists could analyse the chemical content of the plumes.

The 1,900-mile-wide moon is thought to hold two to three times as much water as all the Earth’s oceans.

Europa’s ocean is believed to be salty, and warmed by powerful tidal forces generated by Jupiter’s gravity so that it remains unfrozen.

Source: Independent

Additional reporting by agencies