A RED PLANET
42
Calculated
English phrase A RED PLANET, full reduction
PhotoESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTAUPM/DASP/IDACC BY-SA 3.0 IGO
A RED PLANET reduces to 42. MARS as a four-letter English name does not. The phrase is doing the work.
What it supports
A reproducible modern-English full reduction of the exact string A RED PLANET, recovered on Redworld. Spaces ignored; letters only.
What it does not
Not Latin Mars, not Greek Ἄρης, not a property of iron oxide. The planet is not encoded as 42.
Calculation
A1+R9+E5+D4+P7+L3+A1+N5+E5+T2 = 42
English full reduction (Pythagorean); spaces ignored
ExactnessCipher result
Form42
Unitcipher
Strengthreproducible