Europa's Geysers That Never WereIn 2014, planetary science got one of its biggest thrills in years. A team using the Hubble Space Telescope announced they had spotted towering plumes of water vapor erupting from Europa, Jupiter’s icy moon — jets reaching up to 200 kilometers high, blasting out from beneath a frozen crust. It was an electrifying image: a hidden ocean actively venting into space, like a cosmic invitation to explore. Two years later, another group appeared to independently confirm the geysers. The discovery became a cornerstone for NASA’s ambitious Europa Clipper mission, now scheduled to arrive in the Jupiter system around 2031, with one of its key goals being to fly through and sample these plumes.Then came the plot twist.The same scientist who led the original 2014 study — Lorenz Roth — has now led a comprehensive reanalysis that essentially retracts the famous discovery. After carefully reviewing 14 years of Hubble’s STIS spectrograph observations of Europa, the team realized the “plumes” were an illusion created by a subtle but critical technical error.The original detection hinged on bright emissions of hydrogen (in the Lyman-alpha line) and oxygen — the building blocks of water. But the team had slightly miscalculated Europa’s exact position in the Hubble images — off by just a couple of pixels. That tiny shift was enough to create false signals of localized bursts near the south pole.Making matters worse, earlier analyses hadn’t properly subtracted the noisy background: Earth’s own extended hydrogen atmosphere and Europa’s faint hydrogen exosphere. Once these were correctly accounted for and the positioning was fixed, the dramatic plume signatures vanished across all the data.The result? No evidence of intermittent geysers.Interestingly, the new work wasn’t entirely disappointing. It revealed something real and valuable: Europa possesses a stable, permanent hydrogen exosphere, constantly replenished by the sputtering of its icy surface.The good news is that Europa’s subsurface ocean is not in doubt. Strong tidal heating from Jupiter and multiple lines of indirect evidence still point to a vast, salty ocean beneath the ice. We just won’t have easy access to it through active plumes.Instead of sampling ocean material from space as hoped, the Europa Clipper will have to work harder — getting close to the surface, analyzing the ice, and searching for other signs of habitability. Its arrival in the early 2030s will deliver the final, authoritative verdict.Sometimes the universe keeps its secrets a little better than we thought.