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How a lot water does Jupiter actually have? This is what NASA’s Juno mission discovered

How much water does Jupiter really have? Here's what NASA's Juno mission found - CNN

(CNN)When NASA’s Galileo mission visited Jupiter within the 1990s and commenced its descent, the spacecraft’s information was anticipated to unravel a puzzle for scientists. They needed to know the way a lot water was current in Jupiter’s ambiance.

Enter NASA’s Juno mission, which launched in 2011 and commenced conducting scientific flybys of the planet in 2016. Scientists have used information from the primary eight flybys to find out the quantity of water in Jupiter’s ambiance on the equator, in keeping with a brand new research.
“The Juno mission was in part motivated by the need to determine the water abundance at multiple locations across the planet,” the authors wrote within the research, which revealed lately within the journal Nature Astronomy.
To be clear, water would not essentially imply liquid water, however its parts of hydrogen and oxygen. Understanding the quantity of water on Jupiter can present extra details about the gasoline large‘s previous. The biggest planet in our photo voltaic system was additionally seemingly the primary to type after the solar. The speculation of planet formation means that Jupiter obtained the majority of the gasoline and dirt leftover from our star.
Scientists wish to know the way a lot water was included on this course of. And Jupiter displays processes that embody water and moisture, like its climate patterns and even its lightning, as witnessed by the Voyager probe in 1979.
Based mostly on thermodynamic calculations, scientists imagine that there are three distinct cloud layers in Jupiter’s thick ambiance. They embody ammonia ice clouds, ammonium hydrosulfide ice clouds and clouds made up of water-based droplets and ice, in keeping with the research.
The 1995 Galileo probe information was dropped right into a “hotspot” within the boundary between the equator and the north equatorial belt. Information collected throughout Juno’s flybys confirmed that water makes up 0.25% of molecules in Jupiter’s ambiance at its equator.
Juno can also be geared up with the Microwave Radiometer. Slightly than descending by way of Jupiter’s ambiance, Juno makes use of this instrument to review it from above by way of six antennae gathering temperature information at varied depths, in keeping with NASA. It depends on microwave expertise to detect water absorption at totally different wavelengths.
Juno was additionally capable of surpass the depth of Galileo’s descent, gathering information farther down within the ambiance at 93 miles.
“We found the water in the equator to be greater than what the Galileo probe measured,” mentioned Cheng Li, a Juno scientist on the College of California, Berkeley. “Because the equatorial region is very unique at Jupiter, we need to compare these results with how much water is in other regions.”
The research authors warn that these findings will not be indicative of water abundance throughout Jupiter.
Whether it is globally reflective, it might counsel that the planetary constructing blocks that fashioned Jupiter had been unlikely to have been water-rich clathrate hydrates, or crystalline water-based solids like ice.
How much water does Jupiter really have? Here's what NASA's Juno mission found - CNN
“Just when we think we have things figured out, Jupiter reminds us how much we still have to learn,” mentioned Scott Bolton, Juno principal investigator on the Southwest Analysis Institute in San Antonio. “Juno’s surprise discovery that the atmosphere was not well-mixed even well below the cloud tops is a puzzle that we are still trying to figure out. No one would have guessed that water might be so variable across the planet.”
Sooner or later, the workforce hopes to find out how the water content material might differ throughout areas and the way the poles, dotted with cyclones, may replicate extra perception.
“Every science flyby is an event of discovery,” mentioned Bolton. “With Jupiter there is always something new. Juno has taught us an important lesson: We need to get up close and personal to a planet to test our theories.”

Learn extra: https://www.cnn.com/2020/02/19/world/juno-jupiter-water-mystery-scn/index.html

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