David Wallace
speaker
1,940 appearances
2 recordings
1 series
first heard May 2025
last heard 20 Jul
David Wallace’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.
Appearances
Yeah, sure it does.
Does the moon have an atmosphere?
No.
But there's a little bit of gas on the surface of the moon, and there's no completely sharp point when you leave the Earth's atmosphere and enter interplanetary space.
The odd particle.
makes its way just through Brownian fluctuations from the Earth's atmosphere to the Moon.
So you can't draw a completely sharp, mathematically rigorous line.
You say the Earth has an atmosphere, the moon doesn't, the Earth's atmosphere is separate from the moon, the Earth's atmosphere stops at a certain distance from the Earth.
There's no totally magic place to do that.
You'll have to draw some slightly arbitrary lines to say where it goes.
But nonetheless, there's a very clear
Even if not.
Perfectly precise, extremely precise.
sense in which the Earth's atmosphere does not extend out as far as the Moon.
Um
Or that water is a fluid and granite isn't.
Um
And in the same sense.
There's no completely precise cutting off.
of interference here.
Showing 1161–1180 of 1,940 · page 59 of 97
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