2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127180Systematic error in calculation of z for high redshift type Ia supernovae could help explain unexpected luminosity values that indicate an accelerating rate of expansion of the universe.General PhysicsGeneral Doppler Shift Equation and the Possibility of Systematic Error in Calculation of Z for High Redshift Type Ia Supernovaetext