I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Jon Riley
Toronto