Juno’s Groundbreaking Discovery: Stunning Oxygen Insights From Europa’s Shut Flyby

The ice-covered Jovian moon generates 1,000 tons of oxygen each 24 hours – sufficient to maintain one million people respiration for a day.

Scientists with NASA’s Juno mission to Jupiter have calculated the speed of oxygen being produced on the Jovian moon Europa to be considerably lower than most earlier research. Printed on March 4 in Nature Astronomy, the findings have been derived by measuring hydrogen outgassing from the icy moon’s floor utilizing information collected by the spacecraft’s Jovian Auroral Distributions Experiment (JADE) instrument.

The paper’s authors estimate the quantity of oxygen produced to be round 26 kilos each second (12 kilograms per second). Earlier estimates vary from just a few kilos to over 2,000 kilos per second (over 1,000 kilograms per second). Scientists consider that a number of the oxygen produced on this method might work its approach into the moon’s subsurface ocean as a potential supply of metabolic power.

Europa’s Potential for Life

With an equatorial diameter of 1,940 miles (3,100 kilometers), Europa is the fourth largest of Jupiter’s 95 recognized moons and the smallest of the 4 Galilean satellites. Scientists consider an unlimited inside ocean of salty water lurks beneath its icy crust, and they’re curious in regards to the potential for life-supporting circumstances to exist under the floor.

It isn’t simply the water that has astrobiologists’ consideration: The Jovian moon’s location performs an vital position in organic prospects as effectively. Europa’s orbit locations it proper in the course of the fuel large’s radiation belts. Charged, or ionized, particles from Jupiter bombard the icy floor, splitting water molecules in two to generate oxygen which may discover its approach into the moon’s ocean.

This illustration reveals charged particles from Jupiter impacting Europa’s floor, splitting frozen water molecules into oxygen and hydrogen molecules. Scientists consider a few of these newly created oxygen gases might migrate towards the moon’s subsurface ocean, as depicted within the inset picture. Credit score: NASA/JPL-Caltech/SWRI/PU

“Europa is like an ice ball slowly shedding its water in a flowing stream. Besides, on this case, the stream is a fluid of ionized particles swept round Jupiter by its extraordinary magnetic area,” stated JADE scientist Jamey Szalay from Princeton College in New Jersey. “When these ionized particles impression Europa, they break up the water-ice molecule by molecule on the floor to supply hydrogen and oxygen. In a approach, the complete ice shell is being repeatedly eroded by waves of charged particles washing up upon it.”

Capturing the Bombardment

As Juno flew inside 220 miles (354 kilometers) of Europa at 2:36 p.m. PDT on September 29, 2022, JADE recognized and measured hydrogen and oxygen ions that had been created by the bombarding charged particles after which “picked up” by Jupiter’s magnetic area because it swept previous the moon.

“Again when NASA’S Galileo mission flew by Europa, it opened our eyes to the complicated and dynamic interplay Europa has with its setting. Juno introduced a brand new functionality to straight measure the composition of charged particles shed from Europa’s environment, and we couldn’t wait to additional peek behind the scenes of this thrilling water world,” stated Szalay. “However what we didn’t understand is that Juno’s observations would give us such a good constraint on the quantity of oxygen produced in Europa’s icy floor.”

Juno carries 11 state-of-the-art science devices designed to check the Jovian system, together with 9 charged-particle and electromagnetic-wave sensors for learning Jupiter’s magnetosphere.

“Our skill to fly near the Galilean satellites throughout our prolonged mission allowed us to begin tackling a breadth of science, together with some distinctive alternatives to contribute to the investigation of Europa’s habitability,” stated Scott Bolton, Juno’s principal investigator from the Southwest Analysis Institute in San Antonio. “And we’re not completed but. Extra moon flybys and the primary exploration of Jupiter’s shut ring and polar environment are but to return.”

Oxygen manufacturing is one in every of many aspects that NASA’s Europa Clipper mission will examine when it arrives at Jupiter in 2030. The mission has a complicated payload of 9 science devices to find out if Europa has circumstances that might be appropriate for all times.

Now Bolton and the remainder of the Juno mission staff are setting their sights on one other Jovian world, the volcano-festooned moon Io. On April 9, the spacecraft will come inside about 10,250 miles (16,500 kilometers) of its floor. The info Juno gathers will add to findings from previous Io flybys, together with two extraordinarily shut approaches of about 932 miles (1,500 kilometers) on December 30, 2023, and February 3, 2024.

Reference: “Oxygen manufacturing from dissociation of Europa’s water-ice floor” by J. R. Szalay, F. Allegrini, R. W. Ebert, F. Bagenal, S. J. Bolton, S. Fatemi, D. J. McComas, A. Pontoni, J. Saur, H. T. Smith, D. F. Strobel, S. D. Vance, A. Vorburger and R. J. Wilson, 4 March 2024, Nature Astronomy.
DOI: 10.1038/s41550-024-02206-x

NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Analysis Institute in San Antonio. Juno is a part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall House Flight Heart in Huntsville, Alabama, for the company’s Science Mission Directorate in Washington. The Italian House Company (ASI) funded the Jovian InfraRed Auroral Mapper. Lockheed Martin House in Denver constructed and operates the spacecraft.