ESAの[{” attribute=””>Jupiter Icy Moons Explorer (Juice) lifted off on an Ariane 5 rocket from Europe’s Spaceport in French Guiana at 9:04 a.m. EDT on April 14. The successful launch marks the beginning of an ambitious voyage to uncover the secrets of the ocean worlds around giant planet Jupiter.
Following launch and separation from the rocket, ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany, confirmed acquisition of signal via the New Norcia ground station in Australia at 9:04 a.m. EDT (15:04 CEST). The spacecraft’s vast 27 meter (88 foot) long solar arrays unfurled into their distinctive cross shapes at 9:33 a.m. EDT (15:33 CEST), ensuring Juice can travel to the outer Solar System. The completion of this critical operation marked the launch a success.
“ESA, with its international partners, is on its way to Jupiter,” says ESA Director General Josef Aschbacher. “Juice’s spectacular launch carries with it the vision and ambition of those who conceived the mission decades ago, the skill and passion of everyone who has built this incredible machine, the drive of our flight operations team, and the curiosity of the global science community. Together, we will keep pushing the boundaries of science and exploration in order to answer humankind’s biggest questions.”
ESAの最近の惑星間ミッションジュースは2023年4月14日14:14 CESTにフランス領ギアナのヨーロッパ宇宙ステーションからアリアン5ロケットに乗り離陸し、ガスを詳しく研究する木星への8年旅行を始めました。 巨大な惑星の3つの大きな海のベアリング衛星:ガニメデ、カリスト、ヨーロッパ。 VA260便は宇宙でESAミッションを遂行する最後のアリアン5飛行便です。 クレジット: ESA/CNES/Arianespace
ESAのジュースプロジェクトマネージャーのGiuseppe Sarriは、「ESAのリーダーシップと何百ものヨーロッパ産業と科学機関の努力と献身のおかげで、Juiceの使命が現実になりました」と述べました。 「パートナーと[{” attribute=””>NASA, the Japan Aerospace Exploration Agency, and the Israel Space Agency, who have also contributed hardware or scientific instrumentation, we have reached this much-awaited launch milestone.”
From Galileo to Juice
Jupiter, shining brightly in the night sky, has sparked fascination ever since our ancient ancestors first looked up. Astronomer Galileo Galilei brought Jupiter into focus in 1610, observing the planet through a telescope for the first time and discovering its orbiting moons. His observations overturned the long-held idea that everything in the heavens revolved around Earth. Centuries later, Juice – which carries a commemorative plaque in honor of Galileo’s discoveries – will see Jupiter and its moons in a way that Galileo couldn’t even have dreamt of.
Thanks to the legacy of previous Jupiter missions (see infographic below) we know that three of the planet’s largest moons – Europa, Ganymede, and Callisto – hold quantities of water buried under their surfaces in volumes far greater than in Earth’s oceans. These planet-sized moons offer us tantalizing hints that conditions for life could exist other than here on our ‘pale blue dot’, and Juice is equipped to bring us one step closer to answering this alluring question.
“Over 400 years ago, Galileo discovered moons orbiting Jupiter – news that shocked the Renaissance world and revolutionized humankind’s understanding of our place in the Universe,” says Carole Mundell, ESA’s Director of Science. “Today, we have sent a suite of ground-breaking science instruments on a journey to those moons that will give us an exquisite close-up view that would have been unimaginable to previous generations. Juice carries the dreams of anyone who’s ever gazed up at Jupiter shining brightly in the night sky and wondered about our origins.
“The treasure trove of data that ESA Juice will provide will enable the science community worldwide to dig in and uncover the mysteries of the jovian system, explore the nature and habitability of oceans on other worlds, and answer questions yet unasked by future generations of scientists.”
偉大な探検のオデッセイがすぐに始まります。 外太陽系の人類の次の大胆な任務であるESAのJupiter Icy Moons Explorer、Juiceは、巨大な惑星の木星と最大の衛星を探索する準備ができています。 この興味深い世界は、ガリレオが初めて望遠鏡を惑星に置き、イオ、ユーロ、ガニメデ、カリストなど4つの最大の衛星を発見した後、私たちの好奇心を刺激しました。 出典:ESA/ATG medialab製作
木星への旅行
Juiceは、XMM-Newtonの発売とともに、1999年にさかのぼる長い遺産(以下のインフォグラフィックを参照)でAriane 5で発射する最後のESA宇宙科学ミッションです。 ESA/CSA[{” attribute=””>James Webb Space Telescope in 2021.
“What a magnificent demonstration of Europe’s capacity to dream big and deliver results to match,” says Daniel Neuenschwander, ESA’s Director of Space Transportation. “We can all be proud of Ariane 5 for making possible missions like Juice and setting such a high standard for our new generation of launch systems.”
Over the next two-and-half weeks (see infographic below) Juice will deploy its various antennas and instrument booms, including the 16 m long radar antenna, 10.6 m long magnetometer boom, and various other instruments that will study the environment of Jupiter and the subsurface of the icy moons.
An eight-year cruise with four gravity-assist flybys at Earth and Venus will slingshot the spacecraft toward the outer Solar System. The first flyby in April 2024 will mark a space exploration first: Juice will perform a lunar-Earth gravity-assist – a flyby of the Moon followed 1.5 days later by one of Earth.
ESA’s spacecraft operators, technology engineers, and mission analysts have worked exhaustively to prepare for the challenges that lie ahead on this adventurous mission.
Shields will protect the spacecraft’s sensitive electronics from the monstrous levels of radiation in the Jupiter system. Multi-layered insulation will keep internal temperatures stable while externally they may reach more than 250ºC during the Venus flyby and -230ºC at Jupiter.
“Hundreds of millions of kilometers from Earth and powered by just a sliver of sunlight, we will guide Juice through 35 flybys of Jupiter’s ocean moons in order to gather the data needed to bring scientists closer than ever to these compelling destinations,” says Ignacio Tanco, ESA’s Juice spacecraft operations manager.
“To fly such a complex path from such an enormous distance – and vitally, to get Juice’s valuable data home to Earth – will require precise navigation techniques, reliant on ESA’s deep space antennas in Spain, Argentina and Australia, all controlled remotely from ESOC.”
“We are ready to steer one of the most complex missions ESA has ever flown to adventures in the jovian system,” says Angela Dietz, deputy spacecraft operations manager. “From flybys of Jupiter’s moons over a period of two-and-a-half years, to the immense challenge of switching orbits from massive Jupiter to orbiting Ganymede, we’ll be solving challenges at mission control that have never been done before.”
ESAのJupiter Icy Moons Explorer(Juice)ミッションが解放される5つの謎を発見してください。 磁気環境である木星と衛星は、太陽系で最も興味深いシステムの1つを形成します。 2023年に発射され、2031年に木星に到着する予定のジュースは、この魅力的な惑星と自然衛星についてもっと明らかにします。 クレジット:ESA –[{” attribute=””>European Space Agency
Explore farther
Ganymede, which is larger than the planet Mercury, is Juice’s primary scientific target; it will spend around nine months observing the moon closely from orbit. Ganymede has a particularly intriguing characteristic besides its hidden ocean: it is the only moon in the Solar System to generate its own magnetic field. Only two other solid bodies generate a field like Ganymede’s – Mercury and Earth.
The effect is a mini ‘magnetic bubble’ sitting within Jupiter’s larger one, and the two interact in highly complex ways. Juice will reveal more about the interior structure of Ganymede and in doing so will be able to determine how its core is able to generate and maintain a magnetic field. This will be key to understanding how the moon evolved, and the consequences for habitability.
Ganymede also displays a wide range of surface ages and features, offering a geological record spanning several billion years. This complements its ‘siblings’ – ancient Callisto, which may hold clues to early conditions in the jovian system, and young and active Europa, which vents water into space.
“The scientific treasure that will be returned will undoubtedly have far-reaching implications on how we understand our Solar System and if there are potentially habitable locations beyond Earth – not just in our own cosmic neighborhood but also well beyond in the vast number of exoplanet systems populating our Universe,” says Olivier Witasse, ESA’s Juice project scientist. “In turn, this knowledge will make us richer beings, learning more about ourselves, our origins, and our place in the Universe.”
About Juice
ESA’s Jupiter Icy Moons Explorer, ‘Juice’, is humankind’s next bold mission to the outer Solar System. It will make detailed observations of gas giant Jupiter and its three large ocean-bearing moons – Ganymede, Callisto and Europa. This ambitious mission will characterize these moons with a powerful suite of remote sensing, geophysical, and in situ instruments to discover more about these compelling destinations as potential habitats for past or present life. Juice will monitor Jupiter’s complex magnetic, radiation, and plasma environment in depth and its interplay with the moons, studying the Jupiter system as an archetype for gas giant systems across the Universe.
Juice launches on an Ariane 5 from Europe’s Spaceport in Kourou in April 2023. It has an eight-year cruise with flybys of Earth and Venus to slingshot it to Jupiter. It will make 35 flybys of the three large moons while orbiting Jupiter, before changing orbits to Ganymede.
Juice is a mission under ESA leadership with contributions from NASA, JAXA, and the Israel Space Agency. It is the first Large-class mission in ESA’s Cosmic Vision program.
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