NASA has selected key contributions to a 2022 European Space Agency (ESA)
mission that will study Jupiter and three of its largest moons in
unprecedented detail. The moons are thought to harbor vast water oceans
beneath their icy surfaces. The mission will explore the conditions for
planet formation and emergence of life.
By studying the Jupiter system, JUICE will look to learn more about the
formation and evolution of potentially habitable worlds in our solar
system and beyond.
Jupiter’s diverse Galilean moons – volcanic Io, icy Europa and rock-ice
Ganymede and Callisto – make the Jovian system a miniature Solar System
in its own right. Ganymede is the only moon in the Solar System known to
generate its own magnetic field. JUICE will observe the unique magnetic
and plasma interactions with Jupiter’s magnetosphere in detail.
“Jupiter is the archetype for the giant planets of the Solar System and
for many giant planets being found around other stars,” says Prof.
Alvaro Giménez Cañete, ESA’s Director of Science and Robotic
Exploration.
Under the lead of
Lorenzo Bruzzone of Università degli Studi di Trento and the Italian Space Agency,
JPL will provide the transmitter and receiver hardware for a radar
sounder designed to penetrate the icy crust of Jupiter's moons Europa, Ganymede
and Callisto to a depth of about 5 miles (9 kilometers). This will
allow scientists to see for the first time the underground structure of
these tectonically complex and unique icy worlds.
The spacecraft will orbit Jupiter for three years and travel past
Callisto and Europa multiple times, then orbit Ganymede, a moon larger
than the planet Mercury. JUICE will conduct the first thorough
exploration of Jupiter since NASA's Galileo mission from 1989-2003.
"NASA is thrilled to collaborate with ESA on this exciting mission to
explore Jupiter and its icy moons," said John Grunsfeld, NASA's
associate administrator for science in Washington. "Working together
with ESA and our other international partners is key to enabling future
scientific progress in our quest to understand the cosmos."
The solar-powered spacecraft will carry cameras and spectrometers, a
laser altimeter and an ice-penetrating radar instrument. The mission
also will carry a magnetometer, plasma and particle monitors, and radio
science hardware. The spacecraft is scheduled to arrive at the Jupiter
system in 2030.
In addition to the radar team and instrument, the NASA contributions are:
-- Ultraviolet Spectrometer: The principal investigator is Randy Gladstone of Southwest Research Institute
in San Antonio. This spectrometer will acquire images to explore the
surfaces and atmospheres of Jupiter's icy moons and how they interact
with the Jupiter environment. The instrument also will determine how
Jupiter's upper atmosphere interacts with its lower atmosphere below,
and the ionosphere and magnetosphere above. The instrument will provide
images of the aurora on Jupiter and Ganymede.
-- Particle Environment Package: The principal investigator is Stas Barabash of the Swedish Institute of Space Physics. The U.S. lead is Pontus Brandt of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Md. Under the lead of Barabash and the Swedish National Space Board,
APL will provide instruments to this suite to measure the neutral
material and plasma that are accelerated and heated to extreme levels in
Jupiter's fierce and complex magnetic environment.
Source: The Daily Galaxy via NASA/JPLImage credit: A composite image showing [L-R] the icy moons Europa, Ganymede, & Callisto.
NASA.
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