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Rixter
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Join Date: Apr 2010
Location: About 4000 miles from the center of the earth (+/-100 mi)
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Parker Solar Probe touches surface of the sun

12/17/2021 9:54 PM

As seen from the earth, the sun has a well defined surface. But this apparent surface is actually the boundary where gases first become un-ionized and therefore transparent. The density is only about 1% of earth's atmosphere.

Scott Manley gives an excellent explanation.
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SolarEagle
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Join Date: Mar 2007
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Re: Parker Solar Probe touches surface of the sun

12/18/2021 3:39 PM

I would think this would be more accurate to say the probe touched the upper atmosphere of the Sun than the actual surface...a little click baitey imo... still quite an accomplishment

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dkwarner
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Join Date: May 2006
Location: Placerville, CA (38° 45N, 120° 47'W)
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#2

Re: Parker Solar Probe touches surface of the sun

12/19/2021 11:51 AM

Well done! ...and those words apply to Manley for the video, to Rixter for bringing it to our attention, and especially to the many who conceived and made that probe.

I find it incredible that they can make the electronics to continue working in that environment, sensing, recording, and later transmitting that data to Earth. They clearly have a really effective heat shield and positioning system.

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Haymaker
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Join Date: Feb 2020
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#3

Re: Parker Solar Probe touches surface of the sun

12/24/2021 5:14 PM

Where's that surface? If you proportion the object size and atmospheric thickness of earth and the sun, the sun has a super high(or deep) atmosphere. It would be like parker probe orbiting earth at a distance of 3 or 4 earth radii. And still in atmosphere.

I would be interested in the density gradient of Sol's atmosphere. A density gradient can easily bow light.

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