They are visible from Earth during total solar eclipses.Credit: NASA/Johns Hopkins APL/Naval Research Laboratory As Parker Solar Probe passed through the corona on encounter nine, the spacecraft flew by structures called coronal streamers. Until now, streamers have only been seen from afar. Such a view is only possible because the spacecraft flew above and below the streamers inside the corona.
These structures can be seen as bright features moving upward in the upper images and angled downward in the lower row.
SUN CORONA LINEART MOVIE
This movie shows that data from the WISPR instrument on Parker Solar Probe.Credit: NASA/Johns Hopkins APL/Naval Research Laboratory As Parker Solar Probe passed through the corona on encounter nine, the spacecraft flew by structures called coronal streamers. This movie shows that data from the WISPR instrument on Parker Solar Probe.Credit: NASA/Johns Hopkins APL/Naval Research Laboratory During encounters 8 and 9, Parker Solar Probe flew through structures in the corona called streamers. Beyond it (circle at right), the Sun’s magnetic fields and gravity are too weak to contain the plasma and it becomes the solar wind, racing across the solar system so fast that waves within the wind cannot ever travel fast enough to make it back to the Sun.ĭuring Parker Solar Probe’s eighth orbit around the Sun, the spacecraft flew through structures in the corona called streamers. Inside that surface (circle at left), plasma is connected to the Sun by waves that travel back and forth to the surface.
The boundary that marks the edge of the corona is the Alfvén critical surface. Parker Solar Probe has now “touched the Sun”, passing through the Sun’s outer atmosphere, the corona for the first time in April 2021.
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