This "blog post" appears to just be copy-pasted content from the NASA article [1]. I give credit for the source being cited, but it's still plagiarism.
[1] https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/a...
[1] https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/a...
For plagiarism to apply, the source must not have been cited, and the source must have been copyrighted, neither of which apply here.
One additional sentence between the image and the content like this and it would probably be fine:
"The explanation from OpenAI has some major flaws, here is how this NASA source explains it:"
"passing them off as one's own" is the key part. To prevent this, you make it very clear which parts are your own ideas and which parts are not. If you compare the source to this post, you'll see it's a mix, without delineation.