A NASA’s planetary discovery mission discovered an FM signal emanating from one of the Jupiter gas giant’s moons, Ganymede. “It’s not E.T.,” Patrick Wiggins, one of NASA’s ambassadors to Utah, said. “It’s more of a natural function.” The Juno spacecraft launched in 2011. According to NASA, the decametric radio waves detected have frequencies between 10 and 40 MHz, but never above 40 MHz. “Electrons spiraling in Jupiter’s magnetic field are thought to be the cause of the radio noise we hear,” the space agency added. Juno was only able to spot the radio emission for five seconds as it was orbiting Jupiter at 50 kilometers per second. This is the first time the phenomenon has ever been seen emanating from Ganymede.
In 2015, NASA’s Hubble Space Telescope spotted evidence that Ganymede has an underground ocean. This week, NASA announced the extension of both Juno and InSight missions until 2025, respectively 2023. Now, Juno will explore Jupiter’s rings and larger moons. Jupiter has 79 confirmed moons. Europa may be the most intriguing. Scientists suspect the moon may be habitable.