NASA Sends Europa Clipper for 49 Flybys to Probe Moon's Hidden Ocean
Updated
Updated · spacedaily.com · Aug 1
NASA Sends Europa Clipper for 49 Flybys to Probe Moon's Hidden Ocean
3 articles · Updated · spacedaily.com · Aug 1
Summary
49 close flybys of Europa will let NASA’s Europa Clipper study the moon’s buried ocean after reaching Jupiter in April 2030, with the first Europa pass expected in 2031.
3,100-kilometre-wide Europa may hold about 3 billion cubic kilometres of water—more than twice Earth’s ocean volume—beneath an ice shell thought to be roughly 60 to 150 kilometres thick.
A 4:2:1 orbital resonance among Io, Europa and Ganymede keeps Europa’s orbit slightly elliptical, so Jupiter’s gravity repeatedly flexes the moon and generates tidal heat that helps keep the ocean liquid.
Radar, magnetometer, plasma, thermal and gravity measurements—including flybys as low as 25 kilometres—are designed to estimate the ocean’s depth and salinity, the ice thickness and possible water pockets.
Galileo flyby data from 1995 to 2003 already pointed to a salty global ocean through magnetic evidence, and Clipper’s mission is to test whether Europa offers habitable conditions rather than detect life itself.
With famous water plumes now in doubt, can the approaching Europa Clipper still uncover the secrets of this massive alien ocean?
If deep ocean cracks freeze shut, how could life-sustaining chemicals ever reach Europa's hidden waters?
Could a lightless ocean buried under thirty kilometers of solid ice truly support complex alien life?
Europa Clipper’s Journey: Milestones, Radiation Survival, and the Future of Habitability Science in the Jovian System
Overview
NASA's Europa Clipper, launched in October 2024, began its journey to Jupiter with a series of gravity assists and careful instrument checkouts to prepare for its mission. During its cruise, the spacecraft transmitted early magnetic and radiation data, helping scientists refine models of Europa’s subsurface environment. In a unique scientific opportunity, Europa Clipper observed the interstellar comet 3I/ATLAS when Earth-based telescopes could not, using its ultraviolet spectrograph and coordinating with ESA’s JUICE spacecraft for the first simultaneous multi-directional comet observations. These milestones highlight the mission’s innovative engineering, collaborative science, and its role in advancing our understanding of ocean worlds.