There's a a recent study or two which claim the earth is
surrounded by a large hydrogen cloud (a geocrona) which extends
out to about twice the radius of the moon's orbit.
Space is not a perfect vacuum. It contains a few atoms per m^3.
That does not mean that they belong to Earth's atmosphere, defined by
the atoms and molecules that are retained by Earth's gravity.
There's a a recent study or two which claim the earth is surrounded by a large hydrogen cloud (a geocrona) which extends out to about twice the radius of the moon's orbit.
So if you count that as part of the earth's atmosphere,
https://bigthink.com
I'd take what's on that site with big scepticism. The article you linked to is full of errors and pseudoscience. I can only assume it goes
"Igor Baliukin of Russia's Space Research Institute, the lead author ofthe
study on the subject, explained that "the moon flies through Earth's atmosphere.""
Perhaps that's a bad translation from Russian, but if the lead scientist said,
there's a legitimate scientific discussion to be had on the topic.
None that I'm aware of. There seems to still be a general consensus about the gravity "clause", i.e. when atoms are closer to the Moon than
to Earth (gravity wise), they will be captured by the Moon's gravity and
This doesn't preclude the moon *and* its atmosphere from being entirely encompassed by the earth's atmosphere.
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