NASA's Parker Solar Probe spots solar wind making a surprising U-turn near the Sun

An image captured by NASA’s Parker Solar Probe showing solar material reversing direction near the sun. (Image: NASA)

NASA scientists say new Parker Solar Probe observations reveal how the sun recycles magnetic energy during eruptions. The findings come from images captured during the spacecraft’s closest-ever solar flyby on Christmas Eve 2024.

What Parker Solar Probe observed

During the flyby, Parker passed 3.8 million miles above the surface. The spacecraft recorded a solar flare erupting as scientists expected. A bright cloud of superheated plasma burst outward into space. The material drifted away before thinning and changing direction. Some of the plasma curled back toward the sun. NASA said strong magnetic fields pulled the material inward.

The returning plasma followed magnetic lines that snapped and realigned. Some structures stretched outward into surrounding space. Others looped back and stitched themselves to the sun. Nour Rawafi of Johns Hopkins Applied Physics Laboratory described the view as unusually clear. He said it revealed how coronal material continuously cycles.

What the magnetic recycling means

The eruption observed was a coronal mass ejection. Such events expel vast amounts of superheated solar plasma. When directed toward Earth, they can disrupt power systems. Radio communications and satellite navigation may also be affected. CMEs are also responsible for vivid auroral displays.

NASA explained that expanding plasma stretched nearby magnetic fields. The fields snapped apart, then rapidly reconnected into loops. Some loops escaped into space, while others collapsed inward. Those inward motions dragged solar material back in inflows. Scientists say this reshapes magnetic conditions near the surface.

What comes next for space weather forecasts

As plasma falls back, it alters local magnetic field structures. These changes may influence paths of future eruptions. Angelos Vourlidas, also at Johns Hopkins Applied Physics Laboratory, explained the importance. He said small changes could alter planetary impacts significantly. A CME might strike Mars or pass harmlessly nearby.

Earlier missions like SOHO observed inflows only from afar. Parker’s close images revealed returning material at unseen scales. Scientists measured the speed and size of falling plasma. NASA said these measurements are refining space weather models. Researchers hope this will improve long-term forecasting across the solar system.