The US group sent out a cryptic message, stating that there is “surprising activity” on Europa – the most well known of Jupiter’s 67 moons.

NASA has been analysing data from its Hubble Space Telescope which is currently prowling the universe.

The space experts said in a statement announcing the event this evening, to be broadcast live at 7PM UK time: “Astronomers will present results from a unique Europa observing campaign that resulted in surprising evidence of activity that may be related to the presence of a subsurface ocean on Europa.”

Most scientists agree that where there is water, it massively increases the chances of finding life.