{"id":24363,"date":"2022-12-31T13:07:15","date_gmt":"2022-12-31T13:07:15","guid":{"rendered":"https:\/\/www.africa-press.net\/mauritius\/?p=24363"},"modified":"2022-12-31T11:30:37","modified_gmt":"2022-12-31T11:30:37","slug":"io-volcano-world-comes-into-view-of-juno-probe","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/mauritius\/all-news\/io-volcano-world-comes-into-view-of-juno-probe","title":{"rendered":"Io volcano world comes into view of Juno probe"},"content":{"rendered":"

Africa-Press – Mauritius. <\/strong><\/span>Nasa\u2019s Juno probe is bearing down on Io, the most volcanically active world in the Solar System. It\u2019s in the process of making a series of ever closer flybys.<\/p>\n

Already, the spacecraft has passed by the Jupiter moon at a distance of 80,000km, to reveal details of its hellish, lava-strewn landscape. But Juno will get much, much nearer to Io over the course of the next year, eventually sweeping over the surface at an altitude of just 1,500km.<\/p>\n

It\u2019s more than 20 years since we\u2019ve had such an encounter with the 3,600km-wide object. \u201cWe have a number of objectives besides trying to understand the volcanoes and lava flows, and to map them,\u201d said Juno\u2019s principal investigator, Dr Scott Bolton from the Southwest Research Institute.<\/p>\n

\u201cWe\u2019re also going to be looking at the gravity field, trying to understand the interior structure of Io, to see if we can constrain whether the magma that\u2019s creating all these volcanoes forms a global ocean, or whether it\u2019s spotty,\u201d he told BBC News.<\/p>\n

It\u2019s a fun time for the mission right now. Sent primarily to investigate the origin and evolution of Jupiter, Juno has been able to take in bonus observations of the planet\u2019s four major moons \u2013 Callisto, Ganymede, Europa and now Io.<\/p>\n

The spacecraft is picking them off one by one as its orbit around Jupiter narrows. It performed its close flyby of Ganymede in 2021, and of Europa earlier this year. These passes produced some novel insights from Juno\u2019s microwave radiometer.<\/p>\n

Intended to look deep into the clouds of Jupiter, this instrument has also been able to see down through the ice layers of Ganymede and Europa for tens of kilometres.<\/p>\n

These two moons are of particular interest because they\u2019re both thought to hide a global ocean of liquid water at depth. The speculation is they might both therefore host some form of life.<\/p>\n

Visible images \u2013 that\u2019s pictures taken at wavelengths of light our eyes would detect \u2013 show Ganymede\u2019s surface to be a mixture of darker and brighter patches. The brighter areas are younger and colder. Juno\u2019s radiometer reveals these zonal differences are not just surface phenomena but are related to structures that have deep roots. At Europa, the temperatures are lower but vary less from place to place. And interestingly, they become very uniform at depth.<\/p>\n

\u201cThat may be a hint that you\u2019re getting near the liquid,\u201d said Dr Bolton. \u201cBecause when I get to the liquid, it\u2019s going to be completely uniform, because it\u2019s going to be like a mirror. It\u2019s not crazy to think the water might be just a few kilometres down \u2013 six, eight, something like that. I\u2019m not ready to say that\u2019s the ocean, but it\u2019s conceivable that water is playing a role there.\u201d<\/p>\n

Lori Glaze, the director of planetary science at Nasa, said she was looking forward to the dedicated missions planned for Jupiter\u2019s moons. The European Space Agency\u2019s Juice probe will leave Earth next year and will focus its attention on Ganymede. Nasa\u2019s Clipper satellite will launch in 2024 and will orbit Europa.<\/p>\n

They were very worthy targets, Dr Glaze said. \u201cGalileo Galilei\u2019s discovery of these moons in 1610 marked the birth of modern astronomy,\u201d she recalled.<\/p>\n

\u201cUp to that point, of course, it was assumed that Earth was the centre of the Universe and everything revolved around us. But when he pointed his telescope at Jupiter, what he saw there didn\u2019t fit the paradigm.\u201d Dr Glaze and Dr Bolton were discussing the Juno mission at the American Geophysical Union Fall Meeting in Chicago.<\/p>\n

For More News And Analysis About Mauritius<\/a> Follow Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Mauritius. Nasa\u2019s Juno probe is bearing down on Io, the most volcanically active world in the Solar System. It\u2019s in the process of making a series of ever closer flybys. Already, the spacecraft has passed by the Jupiter moon at a distance of 80,000km, to reveal details of its hellish, lava-strewn landscape. But […]<\/p>\n","protected":false},"author":84,"featured_media":24362,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,9],"tags":[233,245,241,1960],"class_list":["post-24363","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-news","category-miscellaneous","tag-africa-press","tag-africa-press-mauritius","tag-mauritius","tag-nasa"],"yoast_head":"\nIo volcano world comes into view of Juno probe - Mauritius<\/title>\n<meta name=\"description\" content=\"Nasa\u2019s Juno probe is bearing down on Io, the most volcanically active world in the Solar System. 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