corrections, apologies,
many thanks to the proofreader
Numbers refer to index below

(1) The New Dictionary and Handbook of Aerospace
(1969) ed. By Robert W. Marks;
(2) The God Particle by Leon Lederman with Dick Teresi (1993);
(3) Introduction to General, Organic & Biochemistry
(Bettelheim & March) (1988)
(4) Physics without Math by Clarence E. Bennett (1949);
(5) Practical Astronomy with your Calculator by Peter Duffett-Smith (1988);
(6) Yardsticks of the Universe by Owen Bishop (1982).

accidental (1) ( “accidental error”)

selection (1) "selective scattering, selective absorption, selectivity" (2) "selectron"

fixed (1) (fixed “point, area or satellite“)

timescale (1) (“time lag, time series, time signal, time constant, time tick, time tic, time parallax“)