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Swedish space instrument participates in the search for life around Jupiter
by Staff Writers
Stockholm, Sweden (SPX) Nov 19, 2020

The Swedish-led space instrument Particle Environment Package (PEP) is now ready to be sent to Jupiter and its icy moons. The Swedish Institute of Space Physics (IRF) is responsible for the instrument to which eleven countries contribute. Two of the six particle sensors are built at IRF in Kiruna. Photo: Airbus.

The Swedish-led satellite instrument Particle Environment Package (PEP) will help researchers at the Swedish Institute of Space Physics (IRF) to understand how three of Jupiter's icy moons are affected by the particles around Jupiter and search for the pre-conditions for life. After 14 years of work, the instrument is ready to take its place on ESA's Jupiter spacecraft JUICE.

Prof. Stas Barbash is the Principal Investigator for the instrument Particle Environment Package (PEP) on board the European Space Agency's spacecraft JUICE (JUpiter ICy moons Explorer). The instrument is the most advanced that IRF has so far constructed and consists of six sensors, two of which have been developed and built at the IRF head office in Kiruna.

The instrument will measure particles around Jupiter and the three icy moons Europa, Callisto and Ganymede and thus contribute to the large puzzle that needs to be put together to understand the complex Jupiter system.

"Icy moons are the most exciting objects in the solar system to study. The dream would of course be to discover a small crack in the ice on the moon Europa through which water from the sea under the ice squirts out. Maybe it's a favorable environment for life under the ice? To fly through the cloud of steam, measure in it and succeed in identifying some kind of trace of life. That would of course be fantastic ", says Stas Barabash.

One of the major challenges for the engineers and scientists who built PEP has been to develop sensors that can perform measurements in an environment that, due to Jupiter's enormous magnetic field, has the strongest radiation in the solar system.

"The radiation doses to which the instrument is exposed can be compared to being in the middle of a collapsed Chernobyl reactor for a short time. Sweden delivers an instrument that not only has to get to this extreme space environment, but also survive in it to provide researchers with unique data ", says Stas Barabash.

For IRF, it is a unique situation that ESA has selected one country and one institute to deliver two of a total of ten instruments on JUICE. IRF's Uppsala office is responsible for the second instrument.

Eleven countries in Europe, the USA and Japan contribute to PEP. JUICE will be launched from French Guiana in June 2022 on board an Ariane-5 rocket. In 2033, the project will end with the spacecraft crashing on the surface of the moon Ganymede.

The work with PEP is done with funding from the Swedish National Space Agency.

Related Links
JUICE at Swedish Institute of Space Physics
The million outer planets of a star called Sol

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Researchers model source of eruption on Jupiter's moon Europa
Stanford CA (SPX) Nov 11, 2020
On Jupiter's icy moon Europa, powerful eruptions may spew into space, raising questions among hopeful astrobiologists on Earth: What would blast out from miles-high plumes? Could they contain signs of extraterrestrial life? And where in Europa would they originate? A new explanation now points to a source closer to the frozen surface than might be expected. Rather than originating from deep within Europa's oceans, some eruptions may originate from water pockets embedded in the icy shell itself, ac ... read more

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