Juno Mission Reveals Jupiter Slightly Smaller and Flatter Than Previously Thought
NASA's Juno spacecraft has provided new measurements indicating Jupiter is marginally smaller and more oblate than earlier estimates.
Recent data from NASA's Juno spacecraft indicate that Jupiter is slightly smaller and more oblate than previously estimated. The planet's equatorial radius is now measured at approximately 71,488 kilometers, about 8 kilometers less than earlier figures, while its polar radius is about 66,842 kilometers, roughly 24 kilometers smaller than prior estimates.
These refined measurements were achieved through radio occultation experiments conducted during Juno's flybys. By analyzing how Juno's radio signals bent as they passed through Jupiter's atmosphere, scientists were able to create detailed maps of the planet's temperature and density, leading to more accurate size and shape determinations.
Professor Yohai Kaspi of the Weizmann Institute of Science commented, "The size of Jupiter hasn't changed, of course, but the way we measure it has."
The updated dimensions have significant implications for understanding Jupiter's internal structure. Slight adjustments in the planet's size allow models of its interior to better align with both gravity data and atmospheric measurements.
These findings not only enhance knowledge of Jupiter but also aid in the study of gas giants beyond our solar system, providing insights into planetary formation and evolution.