3 ms·
https://physics.stackexchange.com/questions/162184/what-is-the-speed-of-sound-in-space https://physics.stackexchange.com/questions/162184/what-is-t...
by andreareina 2y ago
https://physics.stackexchange.com/questions/162184/what-is-the-speed-of-sound-in-space https://physics.stackexchange.com/questions/162184/what-is-t...
- criddell 2y agoFrom that page, it's very low frequency stuff. One comment mentions 1 cycle per month.