What Can We Hear in Space?

nautil.us

2 pointsjnord2 comments

> Seismometers placed on Earth’s moon enable researchers to measure shudders and groans that are mainly caused by meteor impacts, and the squeezing and stretching of its interior by the tidal pull of the Earth.

How would the moon still be squeezed and stretched when it is now tidally locked to Earth?

The Moon isn't fully face locked, there's still residue rocking back and forth, the Earth isn't at all face locked, nor is it gravitationally uniform so there's a small flexing delta G force there as the two move.

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