if sound could travel across a vacuum, would we be able to hear the sun from earth?

I think probably not, because of the atmosphere.

But we do have "sound" from the sun, vibrations interpreted into audio, @petercloud.eth used nasa sound data to produce a layer of the audio in this piece:

Music Producer | Crafting Sound for Sync, Ads, & Games | Working with talented artists across the globe

Elevating onchain creators @brightmoments @ampsfun @nodefoundation

I think probably not, because of the atmosphere.

But we do have "sound" from the sun, vibrations interpreted into audio, @petercloud.eth used nasa sound data to produce a layer of the audio in this piece: https://zora.co/collect/base:0xc3e50ad555043720a98980f7570375bb5f903088/2?referrer=0x316822580ee3725209fd96b1208ef53b73825e56