Jupiter's poles are hiding secrets unseen since 1974
In short: For decades, our view of the solar system's largest planet was limited to its iconic equatorial belts. Now, a solar-powered spacecraft is breaking that boundary, diving toward the poles to capture high-resolution details of a world that has remained largely mysterious for fifty years.
NASA's Juno mission represents a significant leap in planetary science, specifically designed to decode how the solar system's largest planet formed. After a nearly five-year journey, the spacecraft is entering a 20-month orbital phase. During this time, it will circle Jupiter 37 times, maintaining a remarkably close proximity of just 3,100 miles (5,000 kilometers) above the planet's cloud tops. The spacecraft arrived at the planet on July 4, 2016. It relies on solar power to function in this distant orbit. This mission is part of the New Frontiers Program.
The mission's primary distinction is its trajectory toward the poles. While the equatorial regions are defined by familiar belts and zones, the poles present a different landscape: they are mottled with rotating storms of various sizes. These features resemble giant, terrestrial hurricanes. This perspective has been missing from our records since the Pioneer 11 spacecraft performed a flyby in 1974, making Juno's current observations a rare opportunity to study these unique atmospheric dynamics. The JunoCam instrument captured these sharp details from a distance of 120,000 miles from the planet's center. These images were taken on August 27, 2016, just two hours before the closest approach.
By skimming these regions, Juno aims to provide definitive answers regarding Jupiter's internal mysteries, including its core composition, magnetic fields, and overall chemical makeup. The mission is a collaborative effort involving Lockheed Martin Space Systems, the Jet Propulsion Laboratory, and the Southwest Research Institute, all operating under NASA's New Frontiers Program to map the history of our celestial neighborhood. The Jet Propulsion Laboratory in Pasadena manages the project for the principal investigator. Lockheed Martin Space Systems in Denver was responsible for building the craft.
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Sources
- Summary by Intellect · source: Closing in on Jupiter
- Also: Closing in on Jupiter's North Pole - NASA Science
- Also: www.nature.com — Closing in on Jupiter
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