[Astromancer]

Thank-you Binn05.

Prince Charon, might I suggest that Yrth's moon's gravitational field interferes with the source of the anti-Psi radiation. Make the orbit of Yrth's moon far more eliptical than than of Luna. If at the full moon Yrth's satellite was only 160 thousand miles away (two-thirds of Luna's orbit) and at the new moon Yrth's moon was 500 thousand miles away, the gravitational effects on Yrth would vary wildly.