| Case | Singular | Plural |
|---|---|---|
| nom | heliocentrismus | heliocentrismy |
| gen | heliocentrismu | heliocentrismů |
| dat | heliocentrismu | heliocentrismům |
| acc | heliocentrismus | heliocentrismy |
| voc | heliocentrisme | heliocentrismy |
| loc | heliocentrismu | heliocentrismech |
| instr | heliocentrismem | heliocentrismy |