First 3D renders from JunoCam data reveal "frosted cupcake" clouds on Jupiter
by Staff Writers
Brussels, Belgium (SPX) Sep 22, 2022
Animations of the relative heights of the cloud tops of Jupiter reveal delicately textured swirls and peaks that resemble the frosting on top of a cupcake. The results have been presented by citizen scientist and professional mathematician and software developer, Gerald Eichstadt, at the Europlanet Science Congress (EPSC) 2022 in Granada.
The animation uses data from JunoCam, the visible-light camera onboard NASA's Juno spacecraft, which has been orbiting Jupiter since 2016. Put on board initially to increase public engagement around the exploration of Jupiter and its moons, a worldwide team of citizen scientists, working in collaboration with professional astronomers and the Juno team, have demonstrated that JunoCam can also provide valuable science.
"The Juno mission provides us with an opportunity to observe Jupiter in a way which is essentially inaccessible by Earth-based telescopic observations. We can look at the same cloud features from very different angles within only a few minutes." said Dr Eichstatd.
"This has opened up a new opportunity to derive 3D elevation models of Jupiter's cloud-tops. The images of the wonderful chaotic storms on Jupiter seem to come to life, showing clouds rising at different altitudes."
Using the different ways in which sunlight is reflected and scattered by clouds, the team has succeeded in pinpointing the elevation of the cloud-tops observed. Solar illumination is most intense for clouds in the upper atmosphere. Deeper in the atmosphere, more light is absorbed - particularly by methane - before being scattered back up to the camera by the cloud tops.
Understanding the relative heights of the spiky pillars within the swirls will help scientists to unveil in more detail the elements that compose them.
"From theoretical models, the clouds are expected to be composed of different chemical species, ammonia, ammonium hydrosulphide, and water ice from top to bottom." added Dr Eichstadt.
"Once we calibrate our data thanks to other measurements of the same cloud tops, we will test and refine the theoretical predictions and have a better 3D picture of the chemical composition."
Jupiter to reach opposition, closest approach to Earth in 70 years
Washington DC (SPX) Sep 18, 2022
Stargazers can expect excellent views of Jupiter the entire night of Monday, Sept. 26 when the giant planet reaches opposition. From the viewpoint of Earth's surface, opposition happens when an astronomical object rises in the east as the Sun sets in the west, placing the object and the Sun on opposite sides of Earth. Jupiter's opposition occurs every 13 months, making the planet appear larger and brighter than any other time of the year. But that's not all. Jupiter will also make its closest appr ... read more
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