Of course sound cannot propagate in space as it is (almost) empty. But let’s say it could. Then, how loud in dB would be the burning Sun or the Earth spinning on itself and moving in space ?
I don’t think the earth is making much noise - if it did, I’m pretty sure I’d hear it, seeing as I’m standing on it. Also, the sun isn’t burning, but I imagine a solar flare would make a pretty big shockwave passing through an atmosphere.
What about when there’s an earthquake?
The only earthquake I’ve experienced didn’t make all that much noise either 
Well I see your point about “we can’t hear the noise, so there isn’t much” point, but we can’t feel the earth spinning either.
What a question. How heavy is blue? What does an hour smell like? Which weighs more, a kilometer or a hectare? How high is the ocean? How deep is the sky?
That’s true enough, but why would it make a sound at all? If I spin a ball it doesn’t make a sound. I imagine that if you threw it hard enough you’d get a hypersonic bang, but that isn’t caused by the movement itself, but by the amount of air it displaces - that is, friction. At the speed the earth is moving, it would probably burn up rather quickly if it was traveling through air.
Many of the frequencies made by the earth and probably by the sun are far too low for us to hear owing to the physical size of our ear canal and inner ear parts.
Presumably the gaseous hydrogen on the surface of the sun has a lot of sound waves going through it. I don’t think this is a nonsense question.
I think someone in the 19th century managed to invent a photophone or heliophone to convert fluctuations in sunlight into sound.