Parker Solar Probe Reaches 6.1 Million Kilometers From Sun to Probe 80-Year Heating Mystery
Updated
Updated · spacedaily.com · May 29
Parker Solar Probe Reaches 6.1 Million Kilometers From Sun to Probe 80-Year Heating Mystery
9 articles · Updated · spacedaily.com · May 29
NASA’s Parker Solar Probe made its closest solar pass on Dec. 24, 2024, flying about 6.1 million kilometers from the Sun’s surface to gather in-place data from the corona.
That record approach targets the coronal heating problem: the Sun’s outer atmosphere reaches 1 million to 2 million degrees Celsius while the visible surface is only about 5,500C.
Parker’s measurements have already narrowed some explanations, finding suspected magnetic switchbacks absent inside the corona and pointing instead to evidence for cyclotron resonant wave heating.
Scientists still have not closed the case because the likely heating events—nanoflares and fine-scale wave dissipation—occur below current instruments’ resolution, making progress incremental rather than decisive.
Repeated passes every three months, alongside ESA’s Solar Orbiter observations, are expected to refine how much different magnetic processes heat the corona and drive the solar wind.
Could artificial intelligence find the hidden patterns in solar data that finally explain the corona's impossible heat?
Why can't we solve the Sun's oldest mystery, even with a probe flying through its million-degree atmosphere?
Is the Sun’s extreme heat caused by countless tiny explosions or by crashing magnetic waves?
Parker Solar Probe at the Sun’s Edge: Breakthrough Discoveries, Engineering Triumphs, and the Future of Solar Science
Overview
On December 24, 2024, the Parker Solar Probe made a historic close approach to the Sun, showcasing remarkable technological resilience. This achievement was possible because of its advanced Thermal Protection System, which is specially designed to shield the spacecraft from the Sun’s extreme heat and radiation. During this closest approach, the probe’s heat shield was expected to withstand temperatures between 1,600 and 1,700 degrees Fahrenheit. Thanks to this robust protection, the Parker Solar Probe continues its mission, gathering vital data directly from the Sun’s outer atmosphere and pushing the boundaries of solar exploration.