Also as the galaxy rotates the solar system which is imbedded in that rotation transverses section of deep space. (one galactic rotation is like 225 - 250 million years!) This “space” has higher subatomic particle density (and maybe more energetic!) which means more particles entering the atmosphere which create particle showers which ratchet up cloud formation which significant cool the planet. The author claims major glaciations correlate with different positions on the solar system’s orbital path.
Then ad in fluxuations in the earth’s magnetic field, the sun’s magnetic field, & Jupiter & Saturn’ magnetic fluxuations. These sometimes are in sync meaning maximum protection, mostly aren’t sometimes even disappear for awhile. If all are at zero, it likely bad very bad!
Yes, I’ve seen that addressed in one of the many YT videos I’ve watched on this subject. Seems to be a whole subculture reporting on this - Suspicious Observers, Rolf Witschze (sp?), Adapt2030, etc., etc.